Patch merged into coreboot/master: e10ef42 Exynos5420: invoke the cooperative threading in udelay

the following patch was just integrated into master:
commit e10ef42a55705530f54e1f04bc25b21aeda5693a
Author: Ronald G. Minnich 
Date:   Sun Aug 18 20:01:07 2013 -0700

Exynos5420: invoke the cooperative threading in udelay

Call thread_yield_microseconds in udelay. This works with and without
    COOP_MULTITASKING enabled.

Change-Id: Ib3eab00d1630dc4daada850e7458ab89702d1864
    Signed-off-by: Ronald G. Minnich 
    Reviewed-on: https://gerrit.chromium.org/gerrit/66327
    Reviewed-by: Aaron Durbin 
    Reviewed-by: Vincent Palatin 
    Commit-Queue: Ronald G. Minnich 
    Tested-by: Ronald G. Minnich 
    (cherry picked from commit 12e55ba8a68e5d40e08ad169848bdf274887ce0b)
    Signed-off-by: Isaac Christensen 
    Reviewed-on: http://review.coreboot.org/6510
    Tested-by: build bot (Jenkins)

See http://review.coreboot.org/6510 for details.

-gerrit