BSA: Add kernel module code for BSA ACS

Co-authored-by: Chetan Rathore <chetan.rathore@arm.com>
Co-authored-by: Gowtham Siddarth <gowtham.siddarth@arm.com>
Co-authored-by: Sujana M <sujana.m@arm.com>
Co-authored-by: Rajat Goyal <rajat.goyal@arm.com>
Co-authored-by: Jiss Jose <jiss.jose@arm.com>
Co-authored-by: Edhaya Chandran <edhaya.chandran@arm.com>
Co-authored-by: Mairin Kroes <mairin.kroes@arm.com>

Signed-off-by: Gowtham Siddarth <gowtham.siddarth@arm.com>