Deterministic SPI order for IMX8MP

[landswellsong]

If more than 1 ecSPI interface is enabled on the SoM the probe order is random because the DTSI never had aliases for IMX8MP SPI specifically for some reason:

root@imx8mp:~# ls /sys/class/spi_master/spi*/device -l
lrwxrwxrwx 1 root root 0 Jan  8 19:22 /sys/class/spi_master/spi1/device -> ../../../30820000.spi
lrwxrwxrwx 1 root root 0 Jan  8 19:22 /sys/class/spi_master/spi2/device -> ../../../30830000.spi
lrwxrwxrwx 1 root root 0 Jan  8 19:22 /sys/class/spi_master/spi3/device -> ../../../30840000.spi
root@imx8mp:~# reboot
root@imx8mp:~# ls /sys/class/spi_master/spi*/device -l
lrwxrwxrwx 1 root root 0 Jan  8 19:22 /sys/class/spi_master/spi1/device -> ../../../30840000.spi
lrwxrwxrwx 1 root root 0 Jan  8 19:22 /sys/class/spi_master/spi2/device -> ../../../30820000.spi
lrwxrwxrwx 1 root root 0 Jan  8 19:22 /sys/class/spi_master/spi3/device -> ../../../30830000.spi
root@imx8mp:~# reboot
root@imx8mp:~# ls /sys/class/spi_master/spi*/device -l
lrwxrwxrwx 1 root root 0 Jan  8 19:26 /sys/class/spi_master/spi1/device -> ../../../30830000.spi
lrwxrwxrwx 1 root root 0 Jan  8 19:26 /sys/class/spi_master/spi2/device -> ../../../30840000.spi
lrwxrwxrwx 1 root root 0 Jan  8 19:26 /sys/class/spi_master/spi3/device -> ../../../30820000.spi

Backporting my change from the Freescale kernel: Freescale/linux-fslc#764
Alternatively you can just update the kernel when the commit above is merged since it fixes the main include.

PS: mechanically applying changes from my Yocto playground, please test-build before merge. I'm sorry for the typo in the previous PR.