drm/radeon: fix typo in evergreen_mc_resume()

commit 695ddeb4 upstream.

Add missing index that may have led us to enabling
more crtcs than necessary.

May also fix:
https://bugs.freedesktop.org/show_bug.cgi?id=56139Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

drivers/gpu/drm/radeon/evergreen.c

@@ -1164,7 +1164,7 @@ void evergreen_mc_resume(struct radeon_device *rdev, struct evergreen_mc_save *s
 	WREG32(BIF_FB_EN, FB_READ_EN | FB_WRITE_EN);
 
 	for (i = 0; i < rdev->num_crtc; i++) {
-		if (save->crtc_enabled) {
+		if (save->crtc_enabled[i]) {
 			tmp = RREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i]);
 			tmp &= ~EVERGREEN_CRTC_DISP_READ_REQUEST_DISABLE;
 			WREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i], tmp);