[PATCH v10 21/25] Kconfig: fix undefined symbols (g_dnl*) when NET_LWIP is default enabled

[Jerome Forissier]

Fix for link errors on am62px_evm_a53and other platforms when NET_LWIP
is enabled:

 common/dfu.c:34:(.text.run_usb_dnl_gadget+0x68): undefined reference to `g_dnl_clear_detach
 [...]
 common/spl/spl_dfu.c:29:(.text.spl_dfu_cmd+0xb0): undefined reference to `run_usb_dnl_gadget'

- DFU_OVER_USB compiles common/dfu.c which calls g_dnl_clear_detach()
which is implemented in drivers/usb/gadget/g_dnl.c which needs
USB_GADGET_DOWNLOAD
- SPL_DFU compiles common/spl/spl_dfu.c which calls run_usb_dnl_gadget()
which is implemented in common/dfu.c which needs DFU_OVER_USB

Therefore add these dependencies to Kconfig.

Signed-off-by: Jerome Forissier <jerome.forissier at linaro.org>
---
 drivers/dfu/Kconfig        | 1 +
 drivers/usb/gadget/Kconfig | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/dfu/Kconfig b/drivers/dfu/Kconfig
index d034b501360..7de629f103a 100644
--- a/drivers/dfu/Kconfig
+++ b/drivers/dfu/Kconfig
@@ -8,6 +8,7 @@ config DFU_OVER_USB
 	bool
 	select HASH
 	depends on USB_GADGET
+	depends on USB_GADGET_DOWNLOAD
 
 config DFU_OVER_TFTP
 	bool
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 03fe3bca197..ce9364c3172 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -324,6 +324,7 @@ config SPL_DFU
 	select SPL_HASH
 	select SPL_DFU_NO_RESET
 	depends on SPL_RAM_SUPPORT
+	depends on DFU_OVER_USB
 	help
 	  This feature enables the DFU (Device Firmware Upgrade) in SPL with
 	  RAM memory device support. The ROM code will load and execute
-- 
2.40.1