drm/kms: fix kms helper license + Kconfig

Allow the KMS module to work properly, and also rename
it to KMS_HELPER so its clearer what its for.

Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 7e96d74..3c8827a 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -15,9 +15,9 @@
 
 drm-$(CONFIG_COMPAT) += drm_ioc32.o
 
-drm_helper-y := drm_fb_helper.o drm_crtc_helper.o
+drm_kms_helper-y := drm_fb_helper.o drm_crtc_helper.o
 
-obj-$(CONFIG_DRM_MODE_HELPER) += drm_helper.o
+obj-$(CONFIG_DRM_KMS_HELPER) += drm_kms_helper.o
 
 obj-$(CONFIG_DRM)	+= drm.o
 obj-$(CONFIG_DRM_TTM)	+= ttm/