m68k: use mmu timex.h for non-mmu setups as well

The non-mmu timex.h can be cleaned up and ends up being identical
to the mmu timex.h, just just use that.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>

diff --cc arch/m68k/include/asm/timex.h
Simple merge

diff --cc arch/m68k/include/asm/timex_mm.h
Simple merge

diff --cc arch/m68k/include/asm/timex_no.h
Simple merge