powerpc/eeh: Replace pr_warning() with pr_warn()

pr_warn() is equal to pr_warning(), but the former is a bit more
formal according to commit fc62f2f ("kernel.h: add pr_warn for
symmetry to dev_warn, netdev_warn").

The patch replaces pr_warning() with pr_warn().

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/eeh_dev.c

@@ -57,7 +57,8 @@ void *eeh_dev_init(struct device_node *dn, void *data)
 	/* Allocate EEH device */
 	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
 	if (!edev) {
-		pr_warning("%s: out of memory\n", __func__);
+		pr_warn("%s: out of memory\n",
+			__func__);
 		return NULL;
 	}