Patch merged into coreboot/master: lenovo/x60: use correct BLC_PWM_CTL value

the following patch was just integrated into master:
commit 3054ca164e07b8f2dc2532e5672cd070e025ac70
Author: Francis Rowe 
Date:   Mon Jun 22 17:37:06 2015 +0100

lenovo/x60: use correct BLC_PWM_CTL value

Bit 16 in BLC_PWM_CTL enables brightness controls, but the
    current value is generic. Use the proper value, obtained
    by reading BLC_PWM_CTL while running the VBIOS.

Change-Id: Ib273359e1c285b405a9bb26fc217c2f7e255b99f
    Signed-off-by: Francis Rowe 
    Reviewed-on: https://review.coreboot.org/10624
    Tested-by: build bot (Jenkins)
    Reviewed-by: Nico Huber

See https://review.coreboot.org/10624 for details.

-gerrit