pinctrl: msm: Add support to config RCLK

SDC1 also requires the support of configuring RCLK pin.
This requires the adjustment of SDC2 pins offset too.
Add array bounds check before accessing pin config.

Change-Id: I7bbfe23849c45f0f5dc8a7065ad0a18eef5eed83
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>