[PATCH v2] Add make feature support for SoCFPGA Handoff

[Sune Brian]

> Well, I think so long as you can do "make xxx_defconfig" (and a separate
> objdir not source tree), then "make" sees deps and re-runs as needed,
> yes, this should be workable. Thanks.

Fresh UBOOT

```
make socfpga_cyclone5_defconfig
  HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/kconfig/conf.o
  YACC    scripts/kconfig/zconf.tab.c
  LEX     scripts/kconfig/zconf.lex.c
  HOSTCC  scripts/kconfig/zconf.tab.o
  HOSTLD  scripts/kconfig/conf
#
# configuration written to .config
#
```

When the board/xxx/ only got qts

```
make prepare
scripts/kconfig/conf  --syncconfig Kconfig
  UPD     include/config.h
  CFG     u-boot.cfg
  GEN     include/autoconf.mk
  GEN     include/autoconf.mk.dep
  CFG     spl/u-boot.cfg
  GEN     spl/include/autoconf.mk
  UPD     include/config/uboot.release
  UPD     include/generated/version_autogenerated.h
  UPD     include/generated/timestamp_autogenerated.h
  UPD     include/generated/dt.h
  ENVC    include/generated/env.txt
  ENVP    include/generated/env.in
  ENVT    include/generated/environment.h
  HOSTCC  scripts/dtc/dtc.o
  HOSTCC  scripts/dtc/flattree.o
  HOSTCC  scripts/dtc/fstree.o
  HOSTCC  scripts/dtc/data.o
  HOSTCC  scripts/dtc/livetree.o
  HOSTCC  scripts/dtc/treesource.o
  HOSTCC  scripts/dtc/srcpos.o
  HOSTCC  scripts/dtc/checks.o
  HOSTCC  scripts/dtc/util.o
  LEX     scripts/dtc/dtc-lexer.lex.c
  YACC    scripts/dtc/dtc-parser.tab.h
  HOSTCC  scripts/dtc/dtc-lexer.lex.o
  YACC    scripts/dtc/dtc-parser.tab.c
  HOSTCC  scripts/dtc/dtc-parser.tab.o
  HOSTLD  scripts/dtc/dtc
  CC      lib/asm-offsets.s
  UPD     include/generated/generic-asm-offsets.h
  CC      arch/arm/lib/asm-offsets.s
  UPD     include/generated/asm-offsets.h
```

When the board/xxx/handoff is place next to qts

```
make prepare
  UPD     include/generated/timestamp_autogenerated.h
[INFO] Handoff folder found: board/altera/cyclone5-socdk/hps_isw_handoff
[INFO] Handoff subfolder found under board/altera/cyclone5-socdk/hps_isw_handoff
[INFO] Found hiof file:
board/altera/cyclone5-socdk/hps_isw_handoff/ddr3_5128x4_hps_0/ddr3_5128x4_hps_0.hiof
[INFO] Using handoff folder: ddr3_5128x4_hps_0
[INFO] Running BSP generator...
Generating file: board/altera/cyclone5-socdk/qts/sdram_config.h...
Generating file: board/altera/cyclone5-socdk/qts/pinmux_config.h...
Generating file: board/altera/cyclone5-socdk/qts/pll_config.h
Reading file: board/altera/cyclone5-socdk/hps_isw_handoff/ddr3_5128x4_hps_0/ddr3_5128x4_hps_0.hiof...
Generating file: board/altera/cyclone5-socdk/qts/iocsr_config.h...
[DONE] SoCFPGA QTS handoff conversion complete.
```

or simply

```
make -j 8
  UPD     include/generated/timestamp_autogenerated.h
  UPD     include/config/uboot.release
[INFO] Handoff folder found: board/altera/cyclone5-socdk/hps_isw_handoff
[INFO] Handoff subfolder found under board/altera/cyclone5-socdk/hps_isw_handoff
[INFO] Found hiof file:
board/altera/cyclone5-socdk/hps_isw_handoff/ddr3_5128x4_hps_0/ddr3_5128x4_hps_0.hiof
[INFO] Using handoff folder: ddr3_5128x4_hps_0
[INFO] Running BSP generator...
Generating file: board/altera/cyclone5-socdk/qts/sdram_config.h...
Generating file: board/altera/cyclone5-socdk/qts/pinmux_config.h...
Generating file: board/altera/cyclone5-socdk/qts/pll_config.h
  UPD     include/generated/version_autogenerated.h
Reading file: board/altera/cyclone5-socdk/hps_isw_handoff/ddr3_5128x4_hps_0/ddr3_5128x4_hps_0.hiof...
Generating file: board/altera/cyclone5-socdk/qts/iocsr_config.h...
[DONE] SoCFPGA QTS handoff conversion complete.
  LDS     u-boot.lds
  AR      tools/built-in.a
  HOSTCC  tools/gen_eth_addr
  HOSTCC  tools/gen_ethaddr_crc.o
  HOSTCC  tools/img2srec
  WRAP    tools/generated/lib/crc8.c
  HOSTCC  tools/mkenvimage.o
  HOSTCC  tools/os_support.o
  WRAP    tools/generated/lib/crc32.c
  HOSTCC  tools/atmelimage.o
```

Any additional requests?

Brian