ARM: zynq: Enable generic board for Xilinx Zynq

Enable CONFIG_SYS_GENERIC_BOARD for all Zynq boards.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Tested-by: Masahiro Yamada <yamada.m@jp.panasonic.com> [on ZC706 board]

include/configs/zynq-common.h

@@ -339,4 +339,6 @@
 
 #define CONFIG_SYS_UBOOT_START	CONFIG_SYS_TEXT_BASE
 
+#define CONFIG_SYS_GENERIC_BOARD
+
 #endif /* __CONFIG_ZYNQ_COMMON_H */