[U-Boot] All Sparc boards are broken

Hi Daniel,

All Sparc boards are broken because get_tbclk() func is missing.

lib/built-in.o: In function `tick_to_time': u-boot/lib/time.c:56: undefined reference to `get_tbclk' lib/built-in.o: In function `usec_to_tick': u-boot/lib/time.c:80: undefined reference to `get_tbclk'

Nothing has been done with that error since Rob Herring's common timer framework.

Daniel, can you fix them?

Best Regards Masahiro Yamada