drm/bridge: fix typo in Kconfig

fix 's/controller/controllers/'

in the sentence:
Most display controller handle display connectors...
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210326103216.7918-2-dafna.hirschfeld@collabora.com

drivers/gpu/drm/bridge/Kconfig

@@ -55,7 +55,7 @@ config DRM_DISPLAY_CONNECTOR
 	depends on OF
 	help
 	  Driver for display connectors with support for DDC and hot-plug
-	  detection. Most display controller handle display connectors
+	  detection. Most display controllers handle display connectors
 	  internally and don't need this driver, but the DRM subsystem is
 	  moving towards separating connector handling from display controllers
 	  on ARM-based platforms. Saying Y here when this driver is not needed