usb: gadget: Make g_dnl USB settings common

The g_dnl USB settings for the vendor ID, product ID and manufacturer are
actually common settings that can and should be shared by all the gadgets.

Make them common by renaming them, and convert all the users.

Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/include/configs/am43xx_evm.h b/include/configs/am43xx_evm.h
index 7ee69b0..743f953 100644
--- a/include/configs/am43xx_evm.h
+++ b/include/configs/am43xx_evm.h
@@ -89,9 +89,9 @@
 
 #undef CONFIG_USB_GADGET_DOWNLOAD
 #undef CONFIG_USB_GADGET_VBUS_DRAW
-#undef CONFIG_G_DNL_MANUFACTURER
-#undef CONFIG_G_DNL_VENDOR_NUM
-#undef CONFIG_G_DNL_PRODUCT_NUM
+#undef CONFIG_USB_GADGET_MANUFACTURER
+#undef CONFIG_USB_GADGET_VENDOR_NUM
+#undef CONFIG_USB_GADGET_PRODUCT_NUM
 #undef CONFIG_USB_GADGET_DUALSPEED
 #endif