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Fixes: APERTIS-5675

overlays/installer-mx6qsabrelite/boot.cmd

+echo "Copying U-Boot to RAM"
+load mmc 0:1 0x12000000 /deb-binaries/usr/lib/u-boot/mx6qsabrelite/u-boot.imx
+echo "Probing SPI-NOR"
+sf probe 0
+echo "Erasing SPI_NOR"
+sf erase 0x0 0xc0000
+echo "Writing U-Boot to SPI-NOR"
+sf write 0x12000000 0x400 0xc0000
+echo ""
+echo '+-----------------------------------------------------------------+'
+echo '|                  U-Boot installation complete                   |'
+echo '|                                                                 |'
+echo '| Please remove the SD Card and power cycle the board to continue |'
+echo '+-----------------------------------------------------------------+'
+loop 0 0