msm: reduce verbose messages from runtime suspend/resume

change the message level from info into debug

Change-Id: Ic71c11a653c53bf65b73c1e4ee639a83ea7588b6
diff --git a/drivers/usb/host/ehci-msm-hsic.c b/drivers/usb/host/ehci-msm-hsic.c
index e49e2a0..3a84515 100644
--- a/drivers/usb/host/ehci-msm-hsic.c
+++ b/drivers/usb/host/ehci-msm-hsic.c
@@ -674,7 +674,7 @@
 
 	wake_unlock(&mehci->wlock);
 
-	dev_info(mehci->dev, "HSIC-USB in low power mode\n");
+	dev_dbg(mehci->dev, "HSIC-USB in low power mode\n");
 
 	return 0;
 }
@@ -765,7 +765,7 @@
 		pm_runtime_put_noidle(mehci->dev);
 	}
 
-	dev_info(mehci->dev, "HSIC-USB exited from low power mode\n");
+	dev_dbg(mehci->dev, "HSIC-USB exited from low power mode\n");
 
 	return 0;
 }