pinctrl: qcom: Dynamic detection of tile bases

Previous implementation of hard coding the tile base of each GPIO in
the chip specific pinctrl driver introduces issues if different
versions of the chip introduces different tiles. Instead we should
dynamically detect the base of each GPIO by checking the status registers
for each base corresponding to that particular GPIO.

Change-Id: I6c15f5c5141019ed09d02361fb0b6c7eb7763308
Signed-off-by: Kyle Yan <kyan@codeaurora.org>