[U-Boot] Tegra build failure in latest master

[Stephen Warren]

I the latest u-boot/master (0a8e823ad0c5 "Prepare v2014.04-rc1"),
compilation of all Tegra boards fails as below. This is with the ARM
cross-compilers from Ubuntu 12.10.

[swarren at swarren-lx1 u-boot]$ ./MAKEALL -s tegra
Configuring for dalmore board...
cc1: error: bad value (armv5) for -march= switch
cc1: error: bad value (armv5) for -march= switch
/home/swarren/shared/git_wa/tegra-uboot-flasher/u-boot/lib/asm-offsets.c:1:0:
error: bad value (armv5) for -march= switch
make: *** [lib/asm-offsets.s] Error 1
size: './u-boot': No such file
cc1: error: bad value (armv5) for -march= switch
cc1: error: bad value (armv5) for -march= switch
/home/swarren/shared/git_wa/tegra-uboot-flasher/u-boot/lib/asm-offsets.c:1:0:
error: bad value (armv5) for -march= switch
make: *** [lib/asm-offsets.s] Error 1
make: *** Waiting for unfinished jobs....