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/mga_warp.c b/drivers/char/drm/mga_warp.c
index d67f492..651b93c 100644
--- a/drivers/char/drm/mga_warp.c
+++ b/drivers/char/drm/mga_warp.c
@@ -141,7 +141,7 @@
 	if (size > dev_priv->warp->size) {
 		DRM_ERROR("microcode too large! (%u > %lu)\n",
 			  size, dev_priv->warp->size);
-		return DRM_ERR(ENOMEM);
+		return -ENOMEM;
 	}
 
 	switch (dev_priv->chipset) {
@@ -151,7 +151,7 @@
 	case MGA_CARD_TYPE_G200:
 		return mga_warp_install_g200_microcode(dev_priv);
 	default:
-		return DRM_ERR(EINVAL);
+		return -EINVAL;
 	}
 }
 
@@ -177,7 +177,7 @@
 		MGA_WRITE(MGA_WVRTXSZ, 7);
 		break;
 	default:
-		return DRM_ERR(EINVAL);
+		return -EINVAL;
 	}
 
 	MGA_WRITE(MGA_WMISC, (MGA_WUCODECACHE_ENABLE |
@@ -186,7 +186,7 @@
 	if (wmisc != WMISC_EXPECTED) {
 		DRM_ERROR("WARP engine config failed! 0x%x != 0x%x\n",
 			  wmisc, WMISC_EXPECTED);
-		return DRM_ERR(EINVAL);
+		return -EINVAL;
 	}
 
 	return 0;