Staging: rtxxx0: PID checking fixes

* rt3070:
  - add missing pid_nr() invocations

* rt{28,30}70:
  - do not treat PID 0 as valid

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
3 files changed