mmc: sdhci-msm: Fix issue with SD card detect GPIO

Set up the card detect GPIO in active configuration before
configuring it as an IRQ. Otherwise, it can be in some
weird/inconsistent state resulting in flood of interrupts.

Change-Id: I8f2344a72acbd48df745cc9b2602fe4ac6f034d4
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>