Avoid potential uninitialized variable access in fxp driver.
Avoid potential uninitialized variable access in fxp driver.

Found by haesbaert@.

ok haesbaert@ deraadt@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars