rtc: fix platform driver hotplug/coldplug

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

[dbrownell@users.sourceforge.net: more drivers, minor fix]
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Greg KH <greg@kroah.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --cc drivers/rtc/rtc-at32ap700x.c
Simple merge

diff --cc drivers/rtc/rtc-at91rm9200.c
Simple merge

diff --cc drivers/rtc/rtc-bfin.c
Simple merge

diff --cc drivers/rtc/rtc-cmos.c
Simple merge

diff --cc drivers/rtc/rtc-ds1216.c
Simple merge

diff --cc drivers/rtc/rtc-ds1511.c
Simple merge

diff --cc drivers/rtc/rtc-ds1553.c
Simple merge

diff --cc drivers/rtc/rtc-ds1742.c
Simple merge

diff --cc drivers/rtc/rtc-ep93xx.c
Simple merge

diff --cc drivers/rtc/rtc-m48t59.c
Simple merge

diff --cc drivers/rtc/rtc-m48t86.c
Simple merge

diff --cc drivers/rtc/rtc-omap.c
Simple merge

diff --cc drivers/rtc/rtc-rs5c313.c
Simple merge

diff --cc drivers/rtc/rtc-s3c.c
Simple merge

diff --cc drivers/rtc/rtc-sa1100.c
Simple merge

diff --cc drivers/rtc/rtc-sh.c
Simple merge

diff --cc drivers/rtc/rtc-stk17ta8.c
Simple merge

diff --cc drivers/rtc/rtc-v3020.c
Simple merge

diff --cc drivers/rtc/rtc-vr41xx.c
Simple merge