s5p-mfc: Fix a watchdog bug

s5p-mfc: Fix a watchdog bug

<UPSTREAM MERGE NOT REQUIRED>

linux-media commit 33133ea7aca7eedf8b1b4cee514c76dce7654a8c
Original commit message as follows:

  Fixed wrong condition in firmware reload function used by the watchdog.

  Signed-off-by: Kamil Debski <k.debski@samsung.com>
  Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
  Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
  Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Change-Id: I484659ec7100051b83df128a6aef28f02df91a3e
Signed-off-by: John Sheu <sheu@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/45097