ARM: zynq: zynqmp: Line up checkboard message

Use space instead of tab in checkboard print to aligned
it with others boards.

Reported-by: David Glessner <david.glessner@rockwellcollins.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Moritz Fischer <moritz.fischer@ettus.com>
diff --git a/board/xilinx/zynq/board.c b/board/xilinx/zynq/board.c
index e89b05d..01bae5d 100644
--- a/board/xilinx/zynq/board.c
+++ b/board/xilinx/zynq/board.c
@@ -93,7 +93,7 @@
 #ifdef CONFIG_DISPLAY_BOARDINFO
 int checkboard(void)
 {
-	puts("Board:\tXilinx Zynq\n");
+	puts("Board: Xilinx Zynq\n");
 	return 0;
 }
 #endif