ec/starlabs/merlin: Change the fallback value for fn_ctrl_swap

Change the fallback value of the `fn_ctrl_swap` option to 0, which
is disabled.

Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: I76329ec59ba630c987a122bffb8045150facdf08
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74916
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>

src/ec/starlabs/merlin/nuvoton.c

@@ -110,7 +110,7 @@ static void merlin_init(struct device *dev)
 
 	ec_write(ECRAM_FN_CTRL_REVERSE,
 		get_ec_value_from_option("fn_ctrl_swap",
-					 1,
+					 0,
 					 fn_ctrl_swap,
 					 ARRAY_SIZE(fn_ctrl_swap)));