mmc: core: fix the issue with clock scaling in HS400 mode

Clock scaling feature would scale up/down the MMC interface clock
frequency based on the load on storage. During clock scale up in HS400
bus speed mode, SW is unncesserily doing the tuning even after HS400
switch is done. This change fixes this bug.

CRs-Fixed: 660534
Change-Id: I4de06962a3fe6dba2e7ff8420d9a3e3997b33ba1
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
1 file changed