nvidia/ck804: Move HAVE_HARD_RESET to southbridge

No in-tree ck804-using board has it not selected, so move
selection from boards to southbridge.

Change-Id: I3064b406cfd5ad18067c597bd5b5866a720f7e87
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/657
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
6 files changed