superio/nuvoton: factor out generic romstage components

The romstage of Nuvoton Super I/O chips (but not Nuvoton BMC chips)
is identical, so the early_serial.c file can be moved under
The Nuvoton BMC chip WPCM450 is however left untouched.

Change-Id: I4663176c1003b24a49a9fe5f9ebd27a1963b5565
Signed-off-by: Felix Held <>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <>
Reviewed-by: Edward O'Callaghan <>
Reviewed-by: Dave Frodin <>
7 files changed