xfrm: Correct spelling in xfrm.h

Correct spelling in xfrm.h.
As reported by codespell.

Signed-off-by: Simon Horman <horms@kernel.org>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

include/net/xfrm.h

@@ -79,7 +79,7 @@
    policy entry has list of up to XFRM_MAX_DEPTH transformations,
    described by templates xfrm_tmpl. Each template is resolved
    to a complete xfrm_state (see below) and we pack bundle of transformations
-   to a dst_entry returned to requestor.
+   to a dst_entry returned to requester.
 
    dst -. xfrm  .-> xfrm_state #1
     |---. child .-> dst -. xfrm .-> xfrm_state #2
@@ -1016,7 +1016,7 @@ void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
 
 struct xfrm_if_parms {
 	int link;		/* ifindex of underlying L2 interface */
-	u32 if_id;		/* interface identifyer */
+	u32 if_id;		/* interface identifier */
 	bool collect_md;
 };