drm: add _DRM_CONSISTENT map type

Added a new DRM map type _DRM_CONSISTENT for consistent PCI memory. It
uses drm_pci_alloc/free for allocating/freeing the memory.

From: Felix Kuhling <fxkuehl@gmx.de>
Signed-off-by: David Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/drm_proc.c b/drivers/char/drm/drm_proc.c
index 4774087..f4154cc 100644
--- a/drivers/char/drm/drm_proc.c
+++ b/drivers/char/drm/drm_proc.c
@@ -210,8 +210,8 @@
 
 				/* Hardcoded from _DRM_FRAME_BUFFER,
                                    _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
-                                   _DRM_SCATTER_GATHER. */
-	const char   *types[] = { "FB", "REG", "SHM", "AGP", "SG" };
+                                   _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
+	const char   *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
 	const char   *type;
 	int	     i;
 
@@ -229,9 +229,12 @@
 	if (dev->maplist != NULL) list_for_each(list, &dev->maplist->head) {
 		r_list = list_entry(list, drm_map_list_t, head);
 		map = r_list->map;
-		if(!map) continue;
-		if (map->type < 0 || map->type > 4) type = "??";
-		else				    type = types[map->type];
+		if(!map)
+			continue;
+		if (map->type < 0 || map->type > 5)
+			type = "??";
+		else	
+			type = types[map->type];
 		DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08lx ",
 			       i,
 			       map->offset,