intelmetool: handle failures to mmap MEI memory

Fixes crashes when there is an error mapping memory.

    Error mapping physical memory 0x0000004275159040 [0x4000] ERRNO=1
    Segmentation fault (core dumped)

Change-Id: I5becc0c2870dd97297c4e8d1b101b95b31792ca7
Signed-off-by: Paul Wise <pabs3@bonedaddy.net>
Reviewed-on: https://review.coreboot.org/19562
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

0 files changed, 0 insertions, 0 deletions