payloads/external/iPXE: Update stable version

Update from commit 2afd66eb - Fri Jul 29, 2016
([pixbuf] Enable PNG format by default)

To commit fd6d1f46 -  Fri Mar 31, 2017
([thunderx] Use ThunderxConfigProtocol to obtain board configuration)

This moves the stable iPXE commit forward 144 commits.

Change-Id: Ia0c97f863be39632c9206ca95b3857047fc37e26
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/19221
Tested-by: build bot (Jenkins)
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Timothy Pearson <tpearson@raptorengineering.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2 files changed