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/configs/odroid-xu3_defconfig b/configs/odroid-xu3_defconfig
index a5e47c8..ab7f8bd 100644
--- a/configs/odroid-xu3_defconfig
+++ b/configs/odroid-xu3_defconfig
@@ -43,10 +43,10 @@
 CONFIG_USB_DWC3_PHY_SAMSUNG=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_MANUFACTURER="Samsung"
+CONFIG_USB_GADGET_VENDOR_NUM=0x04e8
+CONFIG_USB_GADGET_PRODUCT_NUM=0x6601
 CONFIG_USB_GADGET_DOWNLOAD=y
-CONFIG_G_DNL_MANUFACTURER="Samsung"
-CONFIG_G_DNL_VENDOR_NUM=0x04e8
-CONFIG_G_DNL_PRODUCT_NUM=0x6601
 CONFIG_USB_HOST_ETHER=y
 CONFIG_VIDEO_BRIDGE=y
 CONFIG_ERRNO_STR=y