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/chromebook_minnie_defconfig b/configs/chromebook_minnie_defconfig
index c1e36fa..fdb992d 100644
--- a/configs/chromebook_minnie_defconfig
+++ b/configs/chromebook_minnie_defconfig
@@ -75,11 +75,11 @@
 CONFIG_SYSRESET=y
 CONFIG_USB=y
 CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_MANUFACTURER="Rockchip"
+CONFIG_USB_GADGET_VENDOR_NUM=0x2207
+CONFIG_USB_GADGET_PRODUCT_NUM=0x320a
 CONFIG_USB_GADGET_DWC2_OTG=y
 CONFIG_USB_GADGET_DOWNLOAD=y
-CONFIG_G_DNL_MANUFACTURER="Rockchip"
-CONFIG_G_DNL_VENDOR_NUM=0x2207
-CONFIG_G_DNL_PRODUCT_NUM=0x320a
 CONFIG_DM_VIDEO=y
 CONFIG_DISPLAY=y
 CONFIG_VIDEO_ROCKCHIP=y