xilinx: versal: Do not prioritize boot device if driver is not enabled

SOC can boot out of the device which is not accessible from APU and running
this is detected as a warning, as the device is not accessible.For example
getting below warning when the boot mode is OSPI and OSPI is not enabled in
device tree.
Invalid bus 0 (err=-19)
Failed to initialize SPI flash at 0:0 (error -19)

Ignoring the prioritization of the boot device which driver is not enabled
and continue with the default boot_targets. Recommendation is to use custom
boot_targets via environment file as is done for example for Kria via
zynqmp_kria.env file.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/8b7cca5c7b84cb4854104e0c48f8aa63c4ec5ace.1715322156.git.michal.simek@amd.com
diff --git a/board/xilinx/versal/board.c b/board/xilinx/versal/board.c
index 77ba783..3947467 100644
--- a/board/xilinx/versal/board.c
+++ b/board/xilinx/versal/board.c
@@ -150,14 +150,29 @@
 		break;
 	case QSPI_MODE_24BIT:
 		puts("QSPI_MODE_24\n");
+		if (uclass_get_device_by_name(UCLASS_SPI,
+					      "spi@f1030000", &dev)) {
+			debug("QSPI driver for QSPI device is not present\n");
+			break;
+		}
 		mode = "xspi0";
 		break;
 	case QSPI_MODE_32BIT:
 		puts("QSPI_MODE_32\n");
+		if (uclass_get_device_by_name(UCLASS_SPI,
+					      "spi@f1030000", &dev)) {
+			debug("QSPI driver for QSPI device is not present\n");
+			break;
+		}
 		mode = "xspi0";
 		break;
 	case OSPI_MODE:
 		puts("OSPI_MODE\n");
+		if (uclass_get_device_by_name(UCLASS_SPI,
+					      "spi@f1010000", &dev)) {
+			debug("OSPI driver for OSPI device is not present\n");
+			break;
+		}
 		mode = "xspi0";
 		break;
 	case EMMC_MODE: