RDMA/uverbs: Declare local function static and add brackets to sizeof

Commit 57520751 ("IB/SA: Add OPA path record type") introduced
new local function __ib_copy_path_rec_to_user, but didn't limit its
scope. This produces the following sparse warning:

	drivers/infiniband/core/uverbs_marshall.c:99:6: warning:
	symbol '__ib_copy_path_rec_to_user' was not declared. Should it be
	static?

In addition, it used sizeof ... notations instead of sizeof(...), which
is correct in C, but a little bit misleading. Let's change it too.

Fixes: 57520751 ("IB/SA: Add OPA path record type")
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/core/uverbs_marshall.c

@@ -96,11 +96,11 @@ void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
 }
 EXPORT_SYMBOL(ib_copy_qp_attr_to_user);
 
-void __ib_copy_path_rec_to_user(struct ib_user_path_rec *dst,
+static void __ib_copy_path_rec_to_user(struct ib_user_path_rec *dst,
 				       struct sa_path_rec *src)
 {
-	memcpy(dst->dgid, src->dgid.raw, sizeof src->dgid);
-	memcpy(dst->sgid, src->sgid.raw, sizeof src->sgid);
+	memcpy(dst->dgid, src->dgid.raw, sizeof(src->dgid));
+	memcpy(dst->sgid, src->sgid.raw, sizeof(src->sgid));
 
 	dst->dlid		= htons(ntohl(sa_path_get_dlid(src)));
 	dst->slid		= htons(ntohl(sa_path_get_slid(src)));