arm64: dts: fsd: add sysreg device node

Add SYSREG controller device node, which is available in PERIC, FSYS0,
FSYS1 and CAM block of FSD SoC.

Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Sriranjani P <sriranjani.p@samsung.com>
Reviewed-by: Ravi Patel <ravi.patel@samsung.com>
Link: https://lore.kernel.org/r/20221129115531.102932-3-sriranjani.p@samsung.com


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>