zynq: serial: Simplify serial driver initialization

Define both serial uarts in the driver and return
default uart based on board configuration.

- Move baseaddresses to hardware.h
- Define default baudrate and clock values

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/include/configs/zynq-common.h b/include/configs/zynq-common.h
index bafa01b..b5bf7ac 100644
--- a/include/configs/zynq-common.h
+++ b/include/configs/zynq-common.h
@@ -35,27 +35,12 @@
 #define CONFIG_SYS_BAUDRATE_TABLE  \
 	{300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400}
 
-/* Zynq Serial driver */
-#ifdef CONFIG_ZYNQ_SERIAL_UART0
-# define CONFIG_ZYNQ_SERIAL_BASEADDR0	0xE0000000
-# define CONFIG_ZYNQ_SERIAL_BAUDRATE0	CONFIG_BAUDRATE
-# define CONFIG_ZYNQ_SERIAL_CLOCK0	50000000
-#endif
-
-#ifdef CONFIG_ZYNQ_SERIAL_UART1
-# define CONFIG_ZYNQ_SERIAL_BASEADDR1	0xE0001000
-# define CONFIG_ZYNQ_SERIAL_BAUDRATE1	CONFIG_BAUDRATE
-# define CONFIG_ZYNQ_SERIAL_CLOCK1	50000000
-#endif
-
-#if defined(CONFIG_ZYNQ_SERIAL_UART0) || defined(CONFIG_ZYNQ_SERIAL_UART1)
-# define CONFIG_ZYNQ_SERIAL
-#endif
-
 /* DCC driver */
 #if defined(CONFIG_ZYNQ_DCC)
 # define CONFIG_ARM_DCC
 # define CONFIG_CPU_V6 /* Required by CONFIG_ARM_DCC */
+#else
+# define CONFIG_ZYNQ_SERIAL
 #endif
 
 /* Ethernet driver */