msm: msm_watchdog_v2: Update module parameter comments

Update the comments describing the module parameters for
the msm_watchdog_v2 driver to reflect the correct name of
the driver / module.

Change-Id: I7916b8b96c0b33940f9182007b7e1c2fa3c3e3b4
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>