mmc: tegra: Use SDR104 UHS mode for SDR50 mode

mmc: tegra: Use SDR104 UHS mode for SDR50 mode

Program SDR104 mode in the UHS_MODE_SEL register for SDR50 mode as well.
This is required for better timing and reliable transfers in SDR50 mode.

Bug 1423423

Reviewed-on: http://git-master/r/360182
(cherry picked from commit 52b973fb21acc16a5b6a05d321c6e425a2f63f9a)

Change-Id: I7e7b24fa2849daf83840aef4641e051b927e34a1
Signed-off-by: Pavan Kunapuli <pkunapuli@nvidia.com>
Signed-off-by: Naveen Kumar Arepalli <naveenk@nvidia.com>
Signed-off-by: R Raj Kumar <rrajk@nvidia.com>
Reviewed-on: http://git-master/r/363813
(cherry picked from commit b9e63eb49cb2dcb6fa92c5382d3760b5182c033c)
Reviewed-on: http://git-master/r/410191
GVS: Gerrit_Virtual_Submit
Reviewed-by: Shreshtha Sahu <ssahu@nvidia.com>
Tested-by: Shreshtha Sahu <ssahu@nvidia.com>
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>