arm: zynq: Move serial driver to driver model

Update this driver to use driver model and change all users.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/include/configs/xilinx_zynqmp.h b/include/configs/xilinx_zynqmp.h
index 32ee0fc..36c1100 100644
--- a/include/configs/xilinx_zynqmp.h
+++ b/include/configs/xilinx_zynqmp.h
@@ -55,9 +55,7 @@
 # define CONFIG_ARM_DCC
 # define CONFIG_CPU_ARMV8
 #else
-# if defined(CONFIG_ZYNQ_SERIAL_UART0) || defined(CONFIG_ZYNQ_SERIAL_UART1)
-#  define CONFIG_ZYNQ_SERIAL
-# endif
+# define CONFIG_ZYNQ_SERIAL
 #endif
 
 #define CONFIG_CONS_INDEX		0