caif: Remove OOM messages, use kzalloc

Remove per site OOM messages because they duplicate
the generic mm subsystem OOM message.

Use kzalloc instead of kmalloc/memset
when next to the OOM message removals.

Reduces object size (allyesconfig ~2%)

$ size -t drivers/net/caif/built-in.o.old net/caif/built-in.o.old
   text	   data	    bss	    dec	    hex	filename
  32297	    700	   8224	  41221	   a105	drivers/net/caif/built-in.o.old
  72159	   1317	  20552	  94028	  16f4c	net/caif/built-in.o.old
 104456	   2017	  28776	 135249	  21051	(TOTALS)
$ size -t drivers/net/caif/built-in.o.new net/caif/built-in.o.new
   text	   data	    bss	    dec	    hex	filename
  31975	    700	   8184	  40859	   9f9b	drivers/net/caif/built-in.o.new
  70748	   1317	  20152	  92217	  16839	net/caif/built-in.o.new
 102723	   2017	  28336	 133076	  207d4	(TOTALS)

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/caif/cfcnfg.c b/net/caif/cfcnfg.c
index 52fe33b..f07ab8c 100644
--- a/net/caif/cfcnfg.c
+++ b/net/caif/cfcnfg.c
@@ -78,10 +78,8 @@
 
 	/* Initiate this layer */
 	this = kzalloc(sizeof(struct cfcnfg), GFP_ATOMIC);
-	if (!this) {
-		pr_warn("Out of memory\n");
+	if (!this)
 		return NULL;
-	}
 	this->mux = cfmuxl_create();
 	if (!this->mux)
 		goto out_of_mem;
@@ -108,8 +106,6 @@
 
 	return this;
 out_of_mem:
-	pr_warn("Out of memory\n");
-
 	synchronize_rcu();
 
 	kfree(this->mux);
@@ -448,10 +444,8 @@
 				"- unknown channel type\n");
 		goto unlock;
 	}
-	if (!servicel) {
-		pr_warn("Out of memory\n");
+	if (!servicel)
 		goto unlock;
-	}
 	layer_set_dn(servicel, cnfg->mux);
 	cfmuxl_set_uplayer(cnfg->mux, servicel, channel_id);
 	layer_set_up(servicel, adapt_layer);
@@ -497,10 +491,8 @@
 	case CFPHYTYPE_FRAG:
 		phy_driver =
 		    cfserl_create(CFPHYTYPE_FRAG, phyid, stx);
-		if (!phy_driver) {
-			pr_warn("Out of memory\n");
+		if (!phy_driver)
 			goto out;
-		}
 		break;
 	case CFPHYTYPE_CAIF:
 		phy_driver = NULL;
@@ -521,7 +513,6 @@
 	frml = cffrml_create(phyid, fcs);
 
 	if (!frml) {
-		pr_warn("Out of memory\n");
 		kfree(phyinfo);
 		goto out;
 	}