arm64: dts: ti: k3: Add cfg reg region to ringacc node

Add register range of ringacc cfg node to all k3 SoC dtsi files. This is
normally under Device Management firmware control but some entities like
bootloader have to access directly and thus required to be present in DT.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20230809175932.2553156-3-vigneshr@ti.com


Signed-off-by: Nishanth Menon <nm@ti.com>