OMAP: mux: Add __func__ macro to pr_xxx macros

Removed mux: and added the __func__ macro to make debugging
easier.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/mux34xx.c b/arch/arm/mach-omap2/mux34xx.c
index 4113c93..440c98e 100644
--- a/arch/arm/mach-omap2/mux34xx.c
+++ b/arch/arm/mach-omap2/mux34xx.c
@@ -2049,7 +2049,7 @@
 		package_balls = omap36xx_cbp_ball;
 		break;
 	default:
-		printk(KERN_ERR "mux: Unknown omap package, mux disabled\n");
+		pr_err("%s Unknown omap package, mux disabled\n", __func__);
 		return -EINVAL;
 	}