kmp204x: handle dip-switch for factory settings

Add readout of dip-switch to revert to factory settings.
If one or more dip-switch are set, launch bank 0 that contains the
bootloader to do the required action.

Signed-off-by: Stefan Bigler <stefan.bigler@keymile.com>
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
diff --git a/board/keymile/kmp204x/kmp204x.h b/board/keymile/kmp204x/kmp204x.h
index 34de27e..720e225 100644
--- a/board/keymile/kmp204x/kmp204x.h
+++ b/board/keymile/kmp204x/kmp204x.h
@@ -22,5 +22,6 @@
 void qrio_prst(u8 bit, bool en, bool wden);
 void qrio_prstcfg(u8 bit, u8 mode);
 void qrio_set_leds(void);
+void qrio_enable_app_buffer(void);
 
 void pci_of_setup(void *blob, bd_t *bd);