netlabel: fix the netlbl_catmap_setlong() dummy function

When I added the netlbl_catmap_setlong() function I mistakenly forgot
to mark the associated dummy function as an inline.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Moore <pmoore@redhat.com>

include/net/netlabel.h

@@ -524,10 +524,10 @@ static inline int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap,
 {
 	return 0;
 }
-static int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap,
-				 u32 offset,
-				 unsigned long bitmap,
-				 gfp_t flags)
+static inline int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap,
+					u32 offset,
+					unsigned long bitmap,
+					gfp_t flags)
 {
 	return 0;
 }