rse: DMA ICS: Use bitfield setting for CH.CTRL register

This update improves code readability and provides a reference
implementation for future ICS development. Using the bitfield setting
feature aims to increase robustness and maintainability of ICS
development.

Change-Id: Ifdf40c9531ce9549a5d34175e87a0ea6a81d889e
Signed-off-by: Gautham Ravichandran <gautham.ravichandran@arm.com>
29 files changed