drm/radeon/kms: remove duplicate card_posted() functions

Use the common one for all asics.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index bd9ee90..491dc90 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -1268,7 +1268,7 @@
 	if (r)
 		return r;
 	/* Post card if necessary */
-	if (!r600_card_posted(rdev)) {
+	if (!radeon_card_posted(rdev)) {
 		if (!rdev->bios) {
 			dev_err(rdev->dev, "Card not posted and no BIOS - ignoring\n");
 			return -EINVAL;