Add support for the PHYTEC phyGATE-Tauri-S with i.MX 6ULL with eMMC or
NAND.

Supported features:
        * eMMC/NAND
        * i2c RTC
        * i2c TEMP
        * PMIC
        * PWM
        * debug UART
        * CAN
        * SD card
        * 2x 1Gbit Ethernet
        * RS232/RS485
        * USB 2.0 Host
        * TPM
        * SPI-NOR
Signed-off-by: Alexander Bauer <a.bauer@phytec.de>
Signed-off-by: Jens Lang <j.lang@phytec.de>
Signed-off-by: Andrej Picej <andrej.picej@norik.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>