drm: update r300 register names

Update some of the DRM register names from DRM CVS

Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/r300_cmdbuf.c b/drivers/char/drm/r300_cmdbuf.c
index c08fa50..9fbadb9 100644
--- a/drivers/char/drm/r300_cmdbuf.c
+++ b/drivers/char/drm/r300_cmdbuf.c
@@ -214,13 +214,13 @@
 	ADD_RANGE(0x4F54, 1);
 
 	ADD_RANGE(R300_TX_FILTER_0, 16);
-	ADD_RANGE(R300_TX_UNK1_0, 16);
+	ADD_RANGE(R300_TX_FILTER1_0, 16);
 	ADD_RANGE(R300_TX_SIZE_0, 16);
 	ADD_RANGE(R300_TX_FORMAT_0, 16);
 	ADD_RANGE(R300_TX_PITCH_0, 16);
 	/* Texture offset is dangerous and needs more checking */
 	ADD_RANGE_MARK(R300_TX_OFFSET_0, 16, MARK_CHECK_OFFSET);
-	ADD_RANGE(R300_TX_UNK4_0, 16);
+	ADD_RANGE(R300_TX_CHROMA_KEY_0, 16);
 	ADD_RANGE(R300_TX_BORDER_COLOR_0, 16);
 
 	/* Sporadic registers used as primitives are emitted */