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>

arch/arm/mach-omap2/mux2420.c

@@ -678,7 +678,8 @@ int __init omap2420_mux_init(struct omap_board_mux *board_subset, int flags)
 	case OMAP_PACKAGE_ZAF:
 		/* REVISIT: Please add data */
 	default:
-		pr_warning("mux: No ball data available for omap2420 package\n");
+		pr_warning("%s: No ball data available for omap2420 package\n",
+				__func__);
 	}
 
 	return omap_mux_init("core", OMAP_MUX_REG_8BIT | OMAP_MUX_GPIO_IN_MODE3,