pinctrl: qcom: Dynamic detection of tile virtual address

Previous implementation of hard coding the tile base of each GPIO in
the chip specific pinctrl driver introduces issues if different tiles
are placed far apart and so require big virtual address space to map
them. Instead we can dynamically configure the virtual base address of
the tile which houses a particular GPIO.

Change-Id: Ic53e7d4092145c28c046ea7e12e977ffcd122a4f
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>