msm: reduce verbose messages from runtime suspend/resume

change the message level from info into debug

Change-Id: Ic71c11a653c53bf65b73c1e4ee639a83ea7588b6
diff --git a/arch/arm/mach-msm/mdm_common.c b/arch/arm/mach-msm/mdm_common.c
index 5b181e1..1f54abd 100644
--- a/arch/arm/mach-msm/mdm_common.c
+++ b/arch/arm/mach-msm/mdm_common.c
@@ -73,9 +73,9 @@
 		mdm_drv->pdata->vddmin_resource->mdm2ap_vddmin_gpio);
 
 	if (value == 0)
-		pr_info("External Modem entered Vddmin\n");
+		pr_debug("External Modem entered Vddmin\n");
 	else
-		pr_info("External Modem exited Vddmin\n");
+		pr_debug("External Modem exited Vddmin\n");
 
 	return IRQ_HANDLED;
 }