mfd: rz-mtu3: Remove duplicated include module.h

./drivers/mfd/rz-mtu3.c: linux/module.h is included more than once.

Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230810005938.12519-1-yang.lee@linux.alibaba.com


Signed-off-by: Lee Jones <lee@kernel.org>