drmmode: with 1.7 server, set mode major doesn't get gamma setup.

Noticed this on Fedora, where 1.7 server does gamma via the randr
codepaths however kms doesn't have this call which happens in the
non set_mode_major path.

probably should be backported to released drivers.

Signed-off-by: Dave Airlie <airlied@redhat.com>

src/drmmode_display.c

@@ -363,6 +363,11 @@ drmmode_set_mode_major(xf86CrtcPtr crtc, DisplayModePtr mode,
 		goto done;
 #endif
 
+#if XORG_VERSION_CURRENT >= XORG_VERSION_NUMERIC(1,7,0,0,0)
+	crtc->funcs->gamma_set(crtc, crtc->gamma_red, crtc->gamma_green,
+			       crtc->gamma_blue, crtc->gamma_size);
+#endif
+
 	drmmode_ConvertToKMode(crtc->scrn, &kmode, mode);