Call xf86CrtcRotate from initial drmmode_set_desired_modes call

Fixes various problems when rotation is specified in xorg.conf.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92475

(ported from radeon commit 548e97b3b7d1e94075a54ca2bb4eb683025098a7)
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

src/drmmode_display.c

@@ -2071,6 +2071,8 @@ Bool drmmode_set_desired_modes(ScrnInfoPtr pScrn, drmmode_ptr drmmode,
 			crtc->rotation = crtc->desiredRotation;
 			crtc->x = crtc->desiredX;
 			crtc->y = crtc->desiredY;
+			if (!xf86CrtcRotate(crtc))
+				return FALSE;
 		}
 	}
 	return TRUE;