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/dalmore_defconfig b/configs/dalmore_defconfig
index ba3d478..caf998b 100644
--- a/configs/dalmore_defconfig
+++ b/configs/dalmore_defconfig
@@ -39,10 +39,10 @@
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_MANUFACTURER="NVIDIA"
+CONFIG_USB_GADGET_VENDOR_NUM=0x0955
+CONFIG_USB_GADGET_PRODUCT_NUM=0x701a
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y
-CONFIG_G_DNL_MANUFACTURER="NVIDIA"
-CONFIG_G_DNL_VENDOR_NUM=0x0955
-CONFIG_G_DNL_PRODUCT_NUM=0x701a
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_ASIX=y