Platform/RPi: Replace Bcm283x SoC base register address with a PCD
Define BCM2836_SOC_REGISTERS from PcdBcm283xRegistersAddress. This is
needed in preparation for adding Raspberry Pi 4 support, since the two
Pi's have a different base addresses for the Bcm283x specific registers.
Signed-off-by: Pete Batard <pete@akeo.ie>
Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>