drm/i2c: tda998x: select CONFIG_DRM_KMS_HELPER

This fails to build without the KMS helper functions:

x86_64-linux-ld: drivers/gpu/drm/bridge/tda998x_drv.o: in function `tda998x_detect_work':
tda998x_drv.c:(.text+0x4e6): undefined reference to `drm_kms_helper_hotplug_event'
x86_64-linux-ld: drivers/gpu/drm/bridge/tda998x_drv.o: in function `tda998x_bind':
tda998x_drv.c:(.text.unlikely+0x33): undefined reference to `drm_simple_encoder_init'
x86_64-linux-ld: drivers/gpu/drm/bridge/tda998x_drv.o:(.rodata+0x584): undefined reference to `drm_atomic_helper_connector_reset'
x86_64-linux-ld: drivers/gpu/drm/bridge/tda998x_drv.o:(.rodata+0x590): undefined reference to `drm_helper_probe_single_connector_modes'
x86_64-linux-ld: drivers/gpu/drm/bridge/tda998x_drv.o:(.rodata+0x5a4): undefined reference to `drm_atomic_helper_connector_duplicate_state'
x86_64-linux-ld: drivers/gpu/drm/bridge/tda998x_drv.o:(.rodata+0x5a8): undefined reference to `drm_atomic_helper_connector_destroy_state'

Select the missing symbol and fix up the broken whitespace.

Fixes: 325ba85 ("drm/i2c: move TDA998x driver under drivers/gpu/drm/bridge")
Signed-off-by: Arnd Bergmann <[email protected]>
Reviewed-by: Neil Armstrong <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Dmitry Baryshkov <[email protected]>

Author: arndb

drivers/gpu/drm/bridge/Kconfig

@@ -91,12 +91,13 @@ config DRM_FSL_LDB
 	  Support for i.MX8MP DPI-to-LVDS on-SoC encoder.
 
 config DRM_I2C_NXP_TDA998X
-       tristate "NXP Semiconductors TDA998X HDMI encoder"
-       default m if DRM_TILCDC
-       select CEC_CORE if CEC_NOTIFIER
-       select SND_SOC_HDMI_CODEC if SND_SOC
-       help
-         Support for NXP Semiconductors TDA998X HDMI encoders.
+	tristate "NXP Semiconductors TDA998X HDMI encoder"
+	default m if DRM_TILCDC
+	select CEC_CORE if CEC_NOTIFIER
+	select DRM_KMS_HELPER
+	select SND_SOC_HDMI_CODEC if SND_SOC
+	help
+	  Support for NXP Semiconductors TDA998X HDMI encoders.
 
 config DRM_ITE_IT6263
 	tristate "ITE IT6263 LVDS/HDMI bridge"