memstick: Add module.h to the modular users in drivers/memstick

memstick: Add module.h to the modular users in drivers/memstick

This is another group of drivers that simply assumed that module.h was
everywhere.  But it won't be once we clean up its presence from device.h
Call out the real users of it in advance.

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