drivers/rtc: don't check resource with devm_ioremap_resource

devm_ioremap_resource does sanity checks on the given resource. No need to
duplicate this in the driver.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Stephen Warren <swarren@nvidia.com>

diff --cc drivers/rtc/rtc-nuc900.c
Simple merge

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

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

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