pmem: fix for OMX video playback

Backported from CAF msm-3.4 repo. Thanks to iriijo for reporting.
ARM: msm: vreg is a module and so needs module.h

The MSM7201 vreg appears to have gotten missed in the module.h
cleanup.

Signed-off-by: David Brown <davidb at codeaurora.org>
fs/xattr.c:setxattr(): improve handling of allocation failures