mmc: sdio: print correct UHS mode during card detection

When SDIO3.0 card is detected, incorrect bus speed mode
is printed as part of card detection print in kernel logs.

This change fixes it so that user won't be confused by
looking at incorrect card detection message in logs.

CRs-Fixed: 424685
Change-Id: I06c318895aa17879a4d4ad8c263e46fbfdce7d3b
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>