spi: fsl-espi: add runtime PM

Add runtime PM and use autosuspend instead of suspending the
SPI controller after each transfer.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Heiner Kallweit 2015-08-26 21:21:55 +02:00 • committed by Mark Brown
commit e9abb4db8d