btrfs: kill the key type accessor helpers

btrfs_set_key_type and btrfs_key_type are used inconsistently along with
open coded variants. Other members of btrfs_key are accessed directly
without any helpers anyway.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
diff --git a/fs/btrfs/orphan.c b/fs/btrfs/orphan.c
index 65793ed..47767d5 100644
--- a/fs/btrfs/orphan.c
+++ b/fs/btrfs/orphan.c
@@ -27,7 +27,7 @@
 	int ret = 0;
 
 	key.objectid = BTRFS_ORPHAN_OBJECTID;
-	btrfs_set_key_type(&key, BTRFS_ORPHAN_ITEM_KEY);
+	key.type = BTRFS_ORPHAN_ITEM_KEY;
 	key.offset = offset;
 
 	path = btrfs_alloc_path();
@@ -48,7 +48,7 @@
 	int ret = 0;
 
 	key.objectid = BTRFS_ORPHAN_OBJECTID;
-	btrfs_set_key_type(&key, BTRFS_ORPHAN_ITEM_KEY);
+	key.type = BTRFS_ORPHAN_ITEM_KEY;
 	key.offset = offset;
 
 	path = btrfs_alloc_path();