mainboard/lenovo/g505s/Kconfig: Remove HUDSON_LEGACY_FREE

The Embedded Controller sits behind the LPC bridge and so needs
LPC decodes to be enabled.

Remove the LPC decode enable out of agesawrapper.c. The enable
is in fact done in: 'VOID FchInitResetLpcProgram(IN VOID *FchDataPtr)'
which writes the magic '0xFF03FFD5' to register 0x44 of the PCI 14.3
LPC Bridge to enable LPC decodes when HUDSON_LEGACY_FREE is not defined.

Change-Id: I0b4e99cc0d6f89f0261f26ee61b8c175a373c730
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/7625
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins)