amd/dinar: Handle empty HOOKBEFORE_DRAM_INIT

Removed function only read ACPI MMIO base address from a couple of
registers in IO space.

Change-Id: I25a31b7ac1706b9eebc5db0b9604039928328b0a
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5683
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
1 file changed