platform: qm215: Add gpio and clock related support for SPI interface

Add gpio, irq, iomap, and clock changes to support QUP SPI interface
for QM215 platform.

Change-Id: I096c032603249bc4654b4289e83493af61043e8b
Signed-off-by: Raghavendra Ambadas <rambad@codeaurora.org>