drm/bridge: Put Kconfig entries in a separate menu

Put the Kconfig entries for bridge drivers into a separate menu so that
they are automatically grouped and don't clutter up the top-level menu.

While at it, move the bridge menu towards the end of the top-level menu
where the panel menu is already located.

Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/bridge/Kconfig

@@ -1,11 +1,18 @@
+config DRM_BRIDGE
+	def_bool y
+	depends on DRM
+	help
+	  Bridge registration and lookup framework.
+
+menu "Display Interface Bridges"
+	depends on DRM && DRM_BRIDGE
+
 config DRM_DW_HDMI
 	tristate
-	depends on DRM
 	select DRM_KMS_HELPER
 
 config DRM_NXP_PTN3460
 	tristate "NXP PTN3460 DP/LVDS bridge"
-	depends on DRM
 	depends on OF
 	select DRM_KMS_HELPER
 	select DRM_PANEL
@@ -14,7 +21,6 @@ config DRM_NXP_PTN3460
 
 config DRM_PARADE_PS8622
 	tristate "Parade eDP/LVDS bridge"
-	depends on DRM
 	depends on OF
 	select DRM_PANEL
 	select DRM_KMS_HELPER
@@ -22,3 +28,5 @@ config DRM_PARADE_PS8622
 	select BACKLIGHT_CLASS_DEVICE
 	---help---
 	  Parade eDP-LVDS bridge chip driver.
+
+endmenu