Patch merged into coreboot/master: ef650a5 libpayload: Check for completion more often in ehci_set_periodic_schedule.

the following patch was just integrated into master:
commit ef650a5d2456196d653667de7d02abc0591ec024
Author: Gabe Black 
Date:   Wed Nov 21 02:16:13 2012 -0800

libpayload: Check for completion more often in ehci_set_periodic_schedule.

This function was using mdelay in a loop to check for the completion of an USB
    controller operation. Since we're busy waiting anyway, we might as well wait
    only 1 us before checking again and potentially seeing the completion 999 us
    earlier than we would otherwise.

Change-Id: I177b303c5503a0078c608d5f945c395691d4bd8a
    Signed-off-by: Gabe Black 
    Reviewed-on: http://review.coreboot.org/2522
    Tested-by: build bot (Jenkins)
    Reviewed-by: Dave Frodin 
    Reviewed-by: Anton Kochkov

Build-Tested: build bot (Jenkins) at Tue Feb 26 02:43:51 2013, giving +1
See http://review.coreboot.org/2522 for details.

-gerrit