qat: fix typos and formatting issues
Multiple typos are corrected across the source code.
Formatting corrections are done to improve code quality
and maintainability. Some files which did not have proper
Copyright license are updated.
Reviewed by: markj, ziaee
MFC after: 2 weeks
Sponsored by: Intel Corporation
Differential Revision: https://reviews.freebsd.org/D50379
(cherry picked from commit 25f09d4a9c358c5452435d299e00c1a1bdafff87)