arm: versal: Fix xspi0 boot mode

Use proper number to be aligned with xspi0 boot mode.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/include/configs/xilinx_versal.h b/include/configs/xilinx_versal.h
index 1276612..804525d 100644
--- a/include/configs/xilinx_versal.h
+++ b/include/configs/xilinx_versal.h
@@ -108,7 +108,7 @@
 	"source ${scriptaddr}; echo XSPI: SCRIPT FAILED: continuing...;\0"
 
 #define BOOTENV_DEV_NAME_XSPI(devtypeu, devtypel, instance) \
-	"xspi "
+	"xspi0 "
 
 #define BOOT_TARGET_DEVICES_JTAG(func)	func(JTAG, jtag, na)