Add this option to enable/disable SATA IDE Combined Mode feature
Change-Id: I1ab8acd27947a71baf954f44d0741f81f48e5541
Signed-off-by: Kerry Sheh <kerry.she@amd.com>
Signed-off-by: Kerry Sheh <shekairui@gmail.com>
Reviewed-on: http://review.coreboot.org/231
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marcj303@gmail.com>