usb: common: Weed out USB_**_PRINTFs from usb framework

USB_PRINTF, USB_HUB_PRINTF, USB_STOR_PRINTF, USB_KBD_PRINTF
are nothing but conditional debug prints, depending on DEBUG.
So better remove them and use debug() simply.

Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
diff --git a/common/usb_kbd.c b/common/usb_kbd.c
index 4efbcfe..b962849 100644
--- a/common/usb_kbd.c
+++ b/common/usb_kbd.c
@@ -31,12 +31,6 @@
 
 #include <usb.h>
 
-#ifdef	USB_KBD_DEBUG
-#define USB_KBD_PRINTF(fmt, args...)	printf(fmt, ##args)
-#else
-#define USB_KBD_PRINTF(fmt, args...)
-#endif
-
 /*
  * If overwrite_console returns 1, the stdin, stderr and stdout
  * are switched to the serial port, else the settings in the
@@ -262,7 +256,7 @@
 
 	/* Report keycode if any */
 	if (keycode) {
-		USB_KBD_PRINTF("%c", keycode);
+		debug("%c", keycode);
 		usb_kbd_put_queue(data, keycode);
 	}
 
@@ -324,8 +318,8 @@
 static int usb_kbd_irq(struct usb_device *dev)
 {
 	if ((dev->irq_status != 0) || (dev->irq_act_len != 8)) {
-		USB_KBD_PRINTF("USB KBD: Error %lX, len %d\n",
-				dev->irq_status, dev->irq_act_len);
+		debug("USB KBD: Error %lX, len %d\n",
+		      dev->irq_status, dev->irq_act_len);
 		return 1;
 	}
 
@@ -437,7 +431,7 @@
 	if ((ep->bmAttributes & 3) != 3)
 		return 0;
 
-	USB_KBD_PRINTF("USB KBD: found set protocol...\n");
+	debug("USB KBD: found set protocol...\n");
 
 	data = malloc(sizeof(struct usb_kbd_pdata));
 	if (!data) {
@@ -463,10 +457,10 @@
 	/* We found a USB Keyboard, install it. */
 	usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
 
-	USB_KBD_PRINTF("USB KBD: found set idle...\n");
+	debug("USB KBD: found set idle...\n");
 	usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE, 0);
 
-	USB_KBD_PRINTF("USB KBD: enable interrupt pipe...\n");
+	debug("USB KBD: enable interrupt pipe...\n");
 	usb_submit_int_msg(dev, pipe, data->new, maxp > 8 ? 8 : maxp,
 				ep->bInterval);
 
@@ -497,16 +491,16 @@
 			continue;
 
 		/* We found a keyboard, check if it is already registered. */
-		USB_KBD_PRINTF("USB KBD: found set up device.\n");
+		debug("USB KBD: found set up device.\n");
 		old_dev = stdio_get_by_name(DEVNAME);
 		if (old_dev) {
 			/* Already registered, just return ok. */
-			USB_KBD_PRINTF("USB KBD: is already registered.\n");
+			debug("USB KBD: is already registered.\n");
 			return 1;
 		}
 
 		/* Register the keyboard */
-		USB_KBD_PRINTF("USB KBD: register.\n");
+		debug("USB KBD: register.\n");
 		memset(&usb_kbd_dev, 0, sizeof(struct stdio_dev));
 		strcpy(usb_kbd_dev.name, DEVNAME);
 		usb_kbd_dev.flags =  DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;