Patch merged into coreboot/master: 6cef89f exynos5xxx: use oscillator clock when changing ARM frequency

the following patch was just integrated into master:
commit 6cef89feee1d570c83c4f0490120c6b4e6b2a91a
Author: David Hendricks 
Date:   Tue Aug 6 15:17:37 2013 -0700

exynos5xxx: use oscillator clock when changing ARM frequency

Switch ARM clock source when changing the APLL frequency to avoid
    stability issues.

This is ported from https://gerrit.chromium.org/gerrit/#/c/64189/5

Signed-off-by: David Hendricks

Change-Id: I923107555e6d3287b3694cbf9e4bb548d3e5f4a8
    Reviewed-on: https://gerrit.chromium.org/gerrit/64838
    Reviewed-by: David Hendricks 
    Tested-by: David Hendricks 
    Commit-Queue: David Hendricks

See http://review.coreboot.org/4442 for details.

-gerrit