Handle MODULE_VERBOSE_TWIDDLE in module_verbose_set

If module_verbose is set to a value below MODULE_VERBOSE_TWIDDLE
call twiddle_divisor(UINT_MAX).

This makes more sense here than when we are loading the kernel.

Sponsored by: Juniper Networks, Inc.

(cherry picked from commit e6925175174b1a7d7b5aef035ec684b2d5f628b9)