mb/ga-m57sli: Add cmos.default

If the cmos checksum is incorrect it should fall back to sane defaults.

Change-Id: If16cfc73effd4a825d0cefcd30bfd0e48b2d9132
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/17968
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/mainboard/gigabyte/m57sli/Kconfig

@@ -13,6 +13,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select SUPERIO_ITE_IT8716F_OVERRIDE_FANCTL
 	select PARALLEL_CPU_INIT
 	select HAVE_OPTION_TABLE
+	select HAVE_CMOS_DEFAULT
 	select HAVE_PIRQ_TABLE
 	select HAVE_MP_TABLE
 	select LIFT_BSP_APIC_ID

src/mainboard/gigabyte/m57sli/cmos.default

@@ -0,0 +1,10 @@
+baud_rate = 115200
+debug_level = Spew
+multi_core = Enable
+slow_cpu = off
+max_mem_clock = 200Mhz
+ECC_memory = Enable
+hw_scrubber = Enable
+interleave_chip_selects = Enable
+power_on_after_fail = Disable
+boot_option = Fallback