[coreboot-gerrit] Patch merged into coreboot/master: vboot: vb2ex_printf() ignores null function name

the following patch was just integrated into master:
commit e80c6f6d3cd0eb7bde651364cc29d41da94f0082
Author: Randall Spangler 
Date:   Fri Jan 20 14:48:53 2017 -0800

vboot: vb2ex_printf() ignores null function name

Currently, it will print the function name as a prefix to the debug
    output.  Make it so that a null function name won't get printed, so
    that it's possible to print little bits of debug output.

BUG=chromium:683391
    BRANCH=none
    TEST=build_packages --board=reef chromeos-firmware

Change-Id: I046fa766773fc08a29460db1f884d7902692d182
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: 853ff7176e97e5e1ab664d094e1914c9c94510aa
    Original-Change-Id: I1dff38e4d8ab03118e5f8832a16d82c2d2116ec9
    Original-Signed-off-by: Randall Spangler 
    Original-Reviewed-on: https://chromium-review.googlesource.com/431111
    Original-Reviewed-by: Julius Werner 
    Reviewed-on: https://review.coreboot.org/18204
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/18204 for details.

-gerrit