intel/*bd82x6x/acpi/pch.asl: Correct name of field unit to GP03

GP0e does not fit into the naming scheme of the field units surrounding
this field unit definition. Also the keys for e and 3 are close to each
other supporting the theory that this is indeed a typo.

Change-Id: I43cf288fe1e0240b33971073c1aa8a1db5762e31
Reported-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/5483
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Idwer Vollering <vidwer@gmail.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>