ARM: zynq: Call zynq board_init() in SPL

Call board_init() if SPL is configured with CONFIG_SPL_BOARD_INIT.

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/include/configs/zynq-common.h b/include/configs/zynq-common.h
index 731e69b..2080a61 100644
--- a/include/configs/zynq-common.h
+++ b/include/configs/zynq-common.h
@@ -235,6 +235,7 @@
 #define CONFIG_SPL_LIBCOMMON_SUPPORT
 #define CONFIG_SPL_LIBGENERIC_SUPPORT
 #define CONFIG_SPL_SERIAL_SUPPORT
+#define CONFIG_SPL_BOARD_INIT
 
 #define CONFIG_SPL_LDSCRIPT	"arch/arm/cpu/armv7/zynq/u-boot-spl.lds"