Replace an absolute value with a #define value in bootblock. This is
in preparation for using an additional MTRR in a subsequent patch.
Change-Id: I006c7cfa0057b3ed4a21359fc8367caf6ec5baf3
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/25455
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>