Checkpatch fixes for Cache_inode/*.c and related headers.

Signed-off-by: Matt Benjamin <matt@linuxbox.com>
Hungarian Eradication and Cleanup

Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>
Hungarian Elimination: reqp

Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>
Hungarian: pworker and pcached_res

Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>
Hungarian: preqnfs

Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>
Hungarian: preq

Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>
Hungarian: pworker_data

Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>