arm: dts: imx8m: Require ATF BL31 blob only if not PSCI provider

In case U-Boot itself if the PSCI provider on i.MX8M, do not
require the ATF BL31 blob, as at that point the blob is useless
and would interfere with U-Boot operation.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/dts/imx8mp-u-boot.dtsi b/arch/arm/dts/imx8mp-u-boot.dtsi
index cb9b5b6..07538da 100644
--- a/arch/arm/dts/imx8mp-u-boot.dtsi
+++ b/arch/arm/dts/imx8mp-u-boot.dtsi
@@ -120,6 +120,7 @@
 					};
 				};
 
+#ifndef CONFIG_ARMV8_PSCI
 				atf {
 					description = "ARM Trusted Firmware";
 					type = "firmware";
@@ -133,6 +134,7 @@
 						type = "atf-bl31";
 					};
 				};
+#endif
 
 				@fdt-SEQ {
 					description = "NAME";
@@ -152,7 +154,9 @@
 					description = "NAME";
 					fdt = "fdt-SEQ";
 					firmware = "uboot";
+#ifndef CONFIG_ARMV8_PSCI
 					loadables = "atf";
+#endif
 				};
 			};
 		};