usb: USB keyboard requires DM_KEYBOARD

If CONFIG_DM_USB=y, the USB keyboard only works if CONFIG_DM_KEYBOARD=y.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 6e29119..f697573 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -95,6 +95,7 @@
 
 config USB_KEYBOARD
 	bool "USB Keyboard support"
+	select DM_KEYBOARD if DM_USB
 	select SYS_STDIO_DEREGISTER
 	---help---
 	  Say Y here if you want to use a USB keyboard for U-Boot command line