drm: Remove DRM_ERR OS macro.

This was used to make all ioctl handlers return -errno on linux and errno on
*BSD.  Instead, just return -errno in shared code, and flip sign on return f
shared code to *BSD code.

Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/via_map.c b/drivers/char/drm/via_map.c
index 7fb9d2a..6345c86 100644
--- a/drivers/char/drm/via_map.c
+++ b/drivers/char/drm/via_map.c
@@ -102,7 +102,7 @@
 
 	dev_priv = drm_calloc(1, sizeof(drm_via_private_t), DRM_MEM_DRIVER);
 	if (dev_priv == NULL)
-		return DRM_ERR(ENOMEM);
+		return -ENOMEM;
 
 	dev->dev_private = (void *)dev_priv;