mmc: fix platform driver hotplug/coldplug

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

Also, add missing owner declarations in driver init.

[dbrownell@users.sourceforge.net: registration fixes]
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/mmc/host/wbsd.c b/drivers/mmc/host/wbsd.c
index 4d5f374..be624a0 100644
--- a/drivers/mmc/host/wbsd.c
+++ b/drivers/mmc/host/wbsd.c
@@ -1948,6 +1948,7 @@
 	.resume		= wbsd_platform_resume,
 	.driver		= {
 		.name	= DRIVER_NAME,
+		.owner	= THIS_MODULE,
 	},
 };