Patch merged into coreboot/master: x86 realmode: Set up the 8254 timer before running option rom

the following patch was just integrated into master:
commit 741a0dd89ce67d0fed9a7907bb77ed3ea9afba81
Author: zbao 
Date:   Thu Jun 25 16:58:53 2015 -0400

x86 realmode: Set up the 8254 timer before running option rom

If the 8254 is not set up, the external graphics option rom
    hangs and never returns.

The code is tested on AMD/bettong.

Change-Id: I0022de9d9a275a7d4b7a331ae7fcf793b9f4c5f5
    Signed-off-by: Zheng Bao 
    Signed-off-by: Zheng Bao 
    Reviewed-on: http://review.coreboot.org/10903
    Tested-by: build bot (Jenkins)
    Reviewed-by: Marc Jones

See http://review.coreboot.org/10903 for details.

-gerrit