mmc: core: Skip frequency retries for SDCC slots

Qualcomm SDCC controller supports minimum SD clock frequency
which is required for card initialization. This information is
exported through platform data for each SDCC controller. There is
no need of retrying higher frequencies than the minimum supported
by controller for Qualcomm chipsets which inturn add delay in
detection process if there is no card during suspend/resume cycles.
Hence, skip multiple frequency retries.

Signed-off-by: Sujith Reddy Thumma <sthumma@codeaurora.org>