drm: Fix PANEL_ORIENTATION_QUIRKS breaking the Kconfig DRM menuconfig

All Kconfig menu menu entries should have a depends on MENU_OPTION, the
menu stops after the first Kconfig entry without this depends on.

Since the PANEL_ORIENTATION_QUIRKS option is also used outside of DRM,
it deliberately does not have a depends on DRM, but this causes all
items after it to show as separate items rather then under the DRM
menuconfig.

This commit moves PANEL_ORIENTATION_QUIRKS to the end of the drm Kconfig
file, grouping it with DRM_LIB_RANDOM which also does not depend on DRM,
fixing the DRM menuconfig.

Fixes: 404d1a3e ("drm: Add panel orientation quirks, v6.")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180117081032.6411-1-hdegoede@redhat.com

drivers/gpu/drm/Kconfig

@@ -27,10 +27,6 @@ config DRM_MIPI_DSI
 	bool
 	depends on DRM
 
-# Separate option because drm_panel_orientation_quirks.c is shared with fbdev
-config DRM_PANEL_ORIENTATION_QUIRKS
-	tristate
-
 config DRM_DP_AUX_CHARDEV
 	bool "DRM DP AUX Interface"
 	depends on DRM
@@ -367,6 +363,10 @@ config DRM_SAVAGE
 
 endif # DRM_LEGACY
 
+# Separate option because drm_panel_orientation_quirks.c is shared with fbdev
+config DRM_PANEL_ORIENTATION_QUIRKS
+	tristate
+
 config DRM_LIB_RANDOM
 	bool
 	default n