mmc: Register for device frequency scaling
If CONFIG_MMC_FREQ_SCALING is enabled, register for device frequency
scaling.
Bug
1044607
Reviewed-on: http://git-master/r/214993
(cherry picked from commit
5e5d28d56e7d49569db4abb7207e1679f8d9ad84)
Change-Id: I6633f61ad3fc2dcd4c468954906b23ce0a3545fe
Signed-off-by: Naveen Kumar Arepalli <naveenk@nvidia.com>
Reviewed-on: http://git-master/r/222417
GVS: Gerrit_Virtual_Submit
Reviewed-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Reviewed-by: Pavan Kunapuli <pkunapuli@nvidia.com>