ATA/IDE: fix platform driver hotplug/coldplug

ATA/IDE: fix platform driver hotplug/coldplug

Since 43cc71eed1250755986da4c0f9898f9a635cb3bf, the platform modalias
is prefixed with "platform:".  Add MODULE_ALIAS() to the hotpluggable
ATA and IDE platform drivers, to re-enable auto loading.

NOTE: both ata/pata_platform.c and ide/legacy/ide_platform.c claim
to provide "the" platform_pata driver, and there's no build-time
mutual exclusion mechanism.  This means that configs which enable
both drivers will make some trouble when hotplugging...

[[email protected]: more drivers, registration fixes]
Signed-off-by: Kay Sievers <[email protected]>
Signed-off-by: David Brownell <[email protected]>
Cc: Tejun Heo <[email protected]>
Acked-by: Bartlomiej Zolnierkiewicz <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Jeff Garzik <[email protected]>