x86: drop custom CONFIG_SYS_BAUDRATE_TABLE define

This will add support for a baud rate of 57600.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

include/configs/x86-common.h

@@ -47,8 +47,6 @@
 /*-----------------------------------------------------------------------
  * Serial Configuration
  */
-#define CONFIG_SYS_BAUDRATE_TABLE	{300, 600, 1200, 2400, 4800, \
-					 9600, 19200, 38400, 115200}
 #define CONFIG_SYS_NS16550_PORT_MAPPED
 
 /*-----------------------------------------------------------------------