spi_qsd: Add runtime PM support to SPI QSD driver

Enable and disable the clocks and gpios to the SPI controller
using runtime PM. This serves the dual purpose of reducing power
Consumption a little and letting the core know when the device is idle.

If runtime_pm is not supported, then make sure the device becomes
active in first transaction after system-suspend, instead of
system-resume.

CRs-Fixed: 460988
Change-Id: I2360b6f48491cd0e8e5f1ce54805079daf92e36b
Signed-off-by: Alok Chauhan <alokc@codeaurora.org>