UPSTREAM: Staging: android: ion: fix typos in comments

s/comming/coming/ in drivers/staging/android/ion/ion.c
s/specfic/specific/ in drivers/staging/android/ion/ion.h
s/peformance/performance/ in drivers/staging/android/ion/ion_priv.h

Signed-off-by: Tristan Lelong <tristan@lelong.xyz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit bc47e7d97666ad32993abe0ea924ffa81a8356e7)

Change-Id: If2cb57073cec9311b93a0138a39a222ec9ccec30
Signed-off-by: Rhyland Klein <rklein@nvidia.com>