[U-Boot] Build failure in spi repo

[Stephen Warren]

Jagan, the latest content in u-boot-spi.git master branch fails to build 
for sandbox with:

> In file included from drivers/mtd/spi/spi_flash.c:12:0:
> drivers/mtd/spi/spi_flash.c: In function ‘set_quad_mode’:
> drivers/mtd/spi/spi_flash.c:906:49: error: ‘idcode0’ undeclared (first use in this function)
>    debug("SF: QEB is volatile for %02x flash\n", idcode0);
>                                                  ^
> include/common.h:123:26: note: in definition of macro ‘debug_cond’
>     printf(pr_fmt(fmt), ##args); \
>                           ^
> drivers/mtd/spi/spi_flash.c:906:3: note: in expansion of macro ‘debug’
>    debug("SF: QEB is volatile for %02x flash\n", idcode0);
>    ^
> drivers/mtd/spi/spi_flash.c:906:49: note: each undeclared identifier is reported only once for each function it appears in
>    debug("SF: QEB is volatile for %02x flash\n", idcode0);
>                                                  ^
> include/common.h:123:26: note: in definition of macro ‘debug_cond’
>     printf(pr_fmt(fmt), ##args); \
>                           ^
> drivers/mtd/spi/spi_flash.c:906:3: note: in expansion of macro ‘debug’
>    debug("SF: QEB is volatile for %02x flash\n", idcode0);
>    ^
> make[2]: *** [drivers/mtd/spi/spi_flash.o] Error 1
> make[2]: *** Waiting for unfinished jobs....

The build seems to work with the previous commit though.