mmc: core: Add retuning to cmdq path

Retune only when card is not in enhanced strobe mode
or clock speed is more than HS/DDR speed.

Change-Id: I8c506a69053022fda65d78838f09e905519f07cc
Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
Signed-off-by: Ram Prakash Gupta <rampraka@codeaurora.org>