arm64: zynqmp: Wire QSPI boot mode for SPL

ZynqMP qspi driver is on the way to mainline

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/cpu/armv8/zynqmp/spl.c b/arch/arm/cpu/armv8/zynqmp/spl.c
index 468dc1d..41b0070 100644
--- a/arch/arm/cpu/armv8/zynqmp/spl.c
+++ b/arch/arm/cpu/armv8/zynqmp/spl.c
@@ -102,6 +102,11 @@
 	case SW_SATA_MODE:
 		return BOOT_DEVICE_SATA;
 #endif
+#ifdef CONFIG_SPL_SPI_SUPPORT
+	case QSPI_MODE_24BIT:
+	case QSPI_MODE_32BIT:
+		return BOOT_DEVICE_SPI;
+#endif
 	default:
 		printf("Invalid Boot Mode:0x%x\n", bootmode);
 		break;