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>

src/mainboard/sunw/ultra40/Kconfig

@@ -12,7 +12,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select HAVE_BUS_CONFIG
 	select HAVE_PIRQ_TABLE
 	select HAVE_MP_TABLE
-	select HAVE_HARD_RESET
 	select BOARD_ROMSIZE_KB_1024
 	select CK804_USE_NIC
 	select CK804_USE_ACI