drm: cleanup DRM_DEBUG() parameters

As DRM_DEBUG macro already prints out the __FUNCTION__ string (see
drivers/char/drm/drmP.h), it is not worth doing this again. At some
other places the ending "\n" was added.

airlied:- I cleaned up a few that this patch missed also

Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/i915_dma.c b/drivers/char/drm/i915_dma.c
index 24f86e0..43986d8 100644
--- a/drivers/char/drm/i915_dma.c
+++ b/drivers/char/drm/i915_dma.c
@@ -657,7 +657,7 @@
 	int value;
 
 	if (!dev_priv) {
-		DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
+		DRM_ERROR("called with no initialization\n");
 		return -EINVAL;
 	}
 
@@ -691,7 +691,7 @@
 	drm_i915_setparam_t *param = data;
 
 	if (!dev_priv) {
-		DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
+		DRM_ERROR("called with no initialization\n");
 		return -EINVAL;
 	}
 
@@ -721,7 +721,7 @@
 	drm_i915_hws_addr_t *hws = data;
 
 	if (!dev_priv) {
-		DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
+		DRM_ERROR("called with no initialization\n");
 		return -EINVAL;
 	}