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_verifier.c b/drivers/char/drm/via_verifier.c
index 832d483..46a5791 100644
--- a/drivers/char/drm/via_verifier.c
+++ b/drivers/char/drm/via_verifier.c
@@ -1026,12 +1026,12 @@
 		case state_error:
 		default:
 			*hc_state = saved_state;
-			return DRM_ERR(EINVAL);
+			return -EINVAL;
 		}
 	}
 	if (state == state_error) {
 		*hc_state = saved_state;
-		return DRM_ERR(EINVAL);
+		return -EINVAL;
 	}
 	return 0;
 }
@@ -1082,11 +1082,11 @@
 			break;
 		case state_error:
 		default:
-			return DRM_ERR(EINVAL);
+			return -EINVAL;
 		}
 	}
 	if (state == state_error) {
-		return DRM_ERR(EINVAL);
+		return -EINVAL;
 	}
 	return 0;
 }