mmc: core: HS200 mode support for eMMC 4.5

This patch adds the support of the HS200 bus speed for eMMC 4.5 devices.
The eMMC 4.5 devices have support for 200MHz bus speed. The function
prototype of the tuning function is modified to handle the tuning
command number which is different in sd and mmc case.

Change-Id: If52eab150592d96adb58d98ec19110fe43d2fbc0
Signed-off-by: Girish K S <girish.shivananjappa@linaro.org>
Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
[subhashj@codeaurora.org: Fixed merge conflicts and compilation errors]
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>