boot/xilinx-prebuilt: change versal pdi file permissions

The versal vpl_gen_fixed.pdi file is not a target executable, so the file
permissions should be 644 instead of 755.

Signed-off-by: Neal Frager <neal.frager@amd.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

boot/xilinx-prebuilt/xilinx-prebuilt.mk

@@ -61,7 +61,7 @@ endef
 endif # !BR2_TARGET_XILINX_EMBEDDEDSW_VERSAL_PSMFW
 
 define XILINX_PREBUILT_INSTALL_VERSAL_PDI
-	$(INSTALL) -D -m 0755 $(XILINX_PREBUILT_PDI) \
+	$(INSTALL) -D -m 0644 $(XILINX_PREBUILT_PDI) \
 		$(BINARIES_DIR)/vpl_gen_fixed.pdi
 endef
 else # BR2_TARGET_XILINX_PREBUILT_VERSAL