Revert "exfat: AIO Optimization compatibility fixup"

This reverts commit 1fda79b4b3948a81a8c98370a01245e054007b4d.
Revert "drivers/exfat: add Samsung's open source exFat module version 1.2.4"

This reverts commit 185864c6f64baa0e114b626b2932cd19e3d09ab5.