ARM: zynq: Enable SPL RAM support by default

Use RAM support in jtagboot mode.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NMoritz Fischer <moritz.fischer@ettus.com>

include/configs/zynq-common.h

@@ -304,6 +304,7 @@
 #define CONFIG_SPL_LIBGENERIC_SUPPORT
 #define CONFIG_SPL_SERIAL_SUPPORT
 #define CONFIG_SPL_BOARD_INIT
+#define CONFIG_SPL_RAM_DEVICE
 
 #define CONFIG_SPL_LDSCRIPT	"arch/arm/mach-zynq/u-boot-spl.lds"