ARM: zynq: Setup modeboot variable based on boot mode

modeboot variable is used for saving inforation which bootmode
is used.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

board/xilinx/zynq/board.c

@@ -85,6 +85,12 @@ int board_init(void)
 int board_late_init(void)
 {
 	switch ((zynq_slcr_get_boot_mode()) & ZYNQ_BM_MASK) {
+	case ZYNQ_BM_QSPI:
+		setenv("modeboot", "qspiboot");
+		break;
+	case ZYNQ_BM_NAND:
+		setenv("modeboot", "nandboot");
+		break;
 	case ZYNQ_BM_NOR:
 		setenv("modeboot", "norboot");
 		break;