staging/drm: imx: add missing dependencies

The imx DRM driver needs a couple of extra Kconfig dependencies
to avoid random build failures:

drivers/staging/imx-drm/ipuv3-crtc.c:448:
 undefined reference to `ipu_idmac_put'
 drivers/staging/imx-drm/ipuv3-crtc.c:450: undefined reference to
 `ipu_dmfc_put' drivers/staging/imx-drm/ipuv3-crtc.c:452:
 undefined reference to `ipu_dp_put'
 drivers/staging/imx-drm/ipuv3-crtc.c:454: undefined reference to
 `ipu_di_put'
drivers/built-in.o: In function `ipu_probe':
 :(.text+0x4b4174): undefined reference to `device_reset'
drivers/built-in.o: In function `imx_tve_probe':
 drivers/staging/imx-drm/imx-tve.c:648: undefined reference to
 `devm_regmap_init_mmio_clk'
drivers/built-in.o: In function
 `imx_pd_connector_get_modes':
 drivers/staging/imx-drm/parallel-display.c:78: undefined
 reference to `of_get_drm_display_mode'

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/imx-drm/Kconfig

 config DRM_IMX
 	tristate "DRM Support for Freescale i.MX"
 	select DRM_KMS_HELPER
+	select VIDEOMODE_HELPERS
 	select DRM_GEM_CMA_HELPER
 	select DRM_KMS_CMA_HELPER
 	depends on DRM && (ARCH_MXC || ARCH_MULTIPLATFORM)
@@ -23,6 +24,7 @@ config DRM_IMX_PARALLEL_DISPLAY
 config DRM_IMX_TVE
 	tristate "Support for TV and VGA displays"
 	depends on DRM_IMX
+	select REGMAP_MMIO
 	help
 	  Choose this to enable the internal Television Encoder (TVe)
 	  found on i.MX53 processors.
@@ -30,6 +32,7 @@ config DRM_IMX_TVE
 config DRM_IMX_IPUV3_CORE
 	tristate "IPUv3 core support"
 	depends on DRM_IMX
+	depends on RESET_CONTROLLER
 	help
 	  Choose this if you have a i.MX5/6 system and want
 	  to use the IPU. This option only enables IPU base
@@ -38,5 +41,6 @@ config DRM_IMX_IPUV3_CORE
 config DRM_IMX_IPUV3
 	tristate "DRM Support for i.MX IPUv3"
 	depends on DRM_IMX
+	depends on DRM_IMX_IPUV3_CORE
 	help
 	  Choose this if you have a i.MX5 or i.MX6 processor.