usb: gadget Move: CONFIG_G_DNL_* to Kconfig

And also reformat defconfigs using "make savedefconfig" rule.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
diff --git a/drivers/usb/gadget/g_dnl.c b/drivers/usb/gadget/g_dnl.c
index bd3aad9..45a484c 100644
--- a/drivers/usb/gadget/g_dnl.c
+++ b/drivers/usb/gadget/g_dnl.c
@@ -27,7 +27,7 @@
  * CONFIG_G_DNL_VENDOR_NUM
  * CONFIG_G_DNL_PRODUCT_NUM
  * CONFIG_G_DNL_MANUFACTURER
- * at e.g. ./include/configs/<board>.h
+ * at e.g. ./configs/<board>_defconfig
  */
 
 #define STRING_MANUFACTURER 25