kernel: Add <linux/module.h> to files using it implicitly

kernel: Add <linux/module.h> to files using it implicitly

These files are doing things like module_put and try_module_get
so they need to call out the module.h for explicit inclusion,
rather than getting it via <linux/device.h> which we ideally want
to remove the module.h inclusion from.

If we don't fix them in advance, we will get things like:

kernel/watchdog.c: In function ‘watchdog_timer_fn’:
kernel/watchdog.c:301: error: implicit declaration of function ‘print_modules’
make[2]: *** [kernel/watchdog.o] Error 1

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>