m68k: MAC should select HAVE_PATA_PLATFORM

The defconfigs switched Mac from the deprecated CONFIG_BLK_DEV_PLATFORM
to CONFIG_PATA_PLATFORM.  However, the latter depends on
CONFIG_HAVE_PATA_PLATFORM, which thus must be selected first.

Fixes: b90257bf

 ("m68k: use libata instead of the legacy ide driver")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210712074022.2116655-1-geert@linux-m68k.org