m68k: Move ARCH_HAS_CPU_CACHE_ALIASING

Move the recently added ARCH_HAS_CPU_CACHE_ALIASING to restore
alphabetical sort order.

Fixes: 8690bbcf ("Introduce cpu_dcache_is_aliasing() across all architectures")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/r/4574ad6cc1117e4b5d29812c165bf7f6e5b60773.1714978406.git.geert@linux-m68k.org