coccinelle: Add script to enforce ARRAY_SIZE macro usage

This script detects cases where ARRAY_SIZE can be used such as
where there is a division of sizeof the array by the sizeof its first
element or by any indexed element or the element type. It replaces the
division of the two sizeofs by ARRAY_SIZE helper macro.

Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>