mmc: omap: remove clock rate hard coding
mmc: omap: remove clock rate hard coding

MMC master clock rate can vary for each instance of the MMC controller
on the device. Use clk_get_rate instead to get the value.

Signed-off-by: Balaji TK  <f0390b3e7c10fea0f9130d79020718fd0f40ef6b@ti.com>
Reviewed-by: Venkatraman S <e5433cb8ec0d347bc3697f245ffa1ec71043e3af@ti.com>
Tested-by: Hebbar, Gururaja <6a2266de612724c37d0e44eb1c8e97a41b0fd32d@ti.com>
Acked-by: Santosh Shilimkar <5b4d8dc9ea337fff5fd1729321eda9873ade0b09@ti.com>
Signed-off-by: Chris Ball <6ca7faee6ca9a094b1ee341f11b840a5608a8746@laptop.org>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs