Currently h8/300 does not implement sub-jiffy timekeeping, so there is no
benefit to having arch specific timekeeping code.

This patch simply removes those functions and enables the generic
timekeeping code.
Signed-off-by: NJohn Stultz <johnstul@us.ibm.com>
Acked-by: NYoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>