net/caif: Use pr_fmt

This patch standardizes caif message logging prefixes.

Add #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
Add missing "\n"s to some logging messages
Convert pr_warning to pr_warn

This changes the logging message prefix from CAIF: to caif:
for all uses but caif_socket.c and chnl_net.c.  Those now use
their filename without extension.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/caif/cfdgml.c b/net/caif/cfdgml.c
index ed9d53a..d3ed264 100644
--- a/net/caif/cfdgml.c
+++ b/net/caif/cfdgml.c
@@ -4,6 +4,8 @@
  * License terms: GNU General Public License (GPL) version 2
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
+
 #include <linux/stddef.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
@@ -26,7 +28,7 @@
 {
 	struct cfsrvl *dgm = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
 	if (!dgm) {
-		pr_warning("CAIF: %s(): Out of memory\n", __func__);
+		pr_warn("Out of memory\n");
 		return NULL;
 	}
 	caif_assert(offsetof(struct cfsrvl, layer) == 0);
@@ -49,14 +51,14 @@
 	caif_assert(layr->ctrlcmd != NULL);
 
 	if (cfpkt_extr_head(pkt, &cmd, 1) < 0) {
-		pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
+		pr_err("Packet is erroneous!\n");
 		cfpkt_destroy(pkt);
 		return -EPROTO;
 	}
 
 	if ((cmd & DGM_CMD_BIT) == 0) {
 		if (cfpkt_extr_head(pkt, &dgmhdr, 3) < 0) {
-			pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
+			pr_err("Packet is erroneous!\n");
 			cfpkt_destroy(pkt);
 			return -EPROTO;
 		}
@@ -75,8 +77,7 @@
 		return 0;
 	default:
 		cfpkt_destroy(pkt);
-		pr_info("CAIF: %s(): Unknown datagram control %d (0x%x)\n",
-			__func__, cmd, cmd);
+		pr_info("Unknown datagram control %d (0x%x)\n", cmd, cmd);
 		return -EPROTO;
 	}
 }