Merge tag 'ipu-fixes-3.18' of git://git.pengutronix.de/git/pza/linux into drm-next

IPUv3 fixes for v3.18

* tag 'ipu-fixes-3.18' of git://git.pengutronix.de/git/pza/linux:
  gpu: ipu-v3: Kconfig: Remove SOC_IMX6SL from IMX_IPUV3_CORE Kconfig
  gpu: ipu-v3: ipu-smfc: Do not leave DEBUG defined
  gpu: ipu-v3: Return proper error on ipu_add_client_devices error path
  gpu: ipu-v3: Select GENERIC_IRQ_CHIP to fix build error