fs/9p: Clean-up get_protocol_version() to use strcmp

Signed-off-by: Prem Karat <prem.karat@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index d26d5e9..f7a8d03 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -36,9 +36,9 @@
  */
 
 enum p9_proto_versions{
-	p9_proto_legacy = 0,
-	p9_proto_2000u = 1,
-	p9_proto_2000L = 2,
+	p9_proto_legacy,
+	p9_proto_2000u,
+	p9_proto_2000L,
 };