drivers: serial: uart_xlnx_ps: switch over to DEVICE_MMIO API
drivers: serial: uart_xlnx_ps: switch over to DEVICE_MMIO API

Switch the Xilinx PS UART device driver over to the use of the
DEVICE_MMIO_... macros instead of just using the physical base
address from the device tree.

Signed-off-by: Immo Birnbaum <9d53277017f7b972042afc81794f782b84cac388@weidmueller.com>

galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr