sunxi: Add usb keyboard Kconfig option

For use together with the hdmi console.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig
index 60bc45c..e20ea1b 100644
--- a/board/sunxi/Kconfig
+++ b/board/sunxi/Kconfig
@@ -222,4 +222,11 @@
 	Say Y here to add support for using a cfb console on the HDMI output
 	found on most sunxi devices.
 
+config USB_KEYBOARD
+	boolean "Enable USB keyboard support"
+	default y
+	---help---
+	Say Y here to add support for using a USB keyboard (typically used
+	in combination with a graphical console on HDMI).
+
 endif