Peng Fan authored Nov 20, 2018 and Stefano Babic committed Jan 01, 2019

Add i.MX8MQ EVK support. SPL will initialize ddr and load ddr phy
firmware. Then loading FIT image, ATF to OCRAM, U-Boot and DTB to
DRAM.

The boot log with Arm trusted firmware console enabled:
"
U-Boot SPL 2018.11-00142-g9ae14e7274 (Nov 20 2018 - 18:13:16 +0800)
PMIC:  PFUZE100 ID=0x10
Normal Boot
Trying to boot from MMC2
NOTICE:  Configureing TZASC380
NOTICE:  BL31: v1.5(release):p9.0.0_1.0.0-beta-20180928-8-ge09c4b62-dirty
NOTICE:  BL31: Built : 09:28:54, Nov  8 2018
lpddr4 swffc start
NOTICE:  sip svc init

U-Boot 2018.11-00142-g9ae14e7274 (Nov 20 2018 - 18:13:16 +0800)

CPU:   Freescale i.MX8MQ rev2.0 at 1000 MHz
Reset cause: POR
Model: Freescale i.MX8MQ EVK
DRAM:  3 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
In:    serial
Out:   serial
Err:   serial
Net:
Warning: ethernet@30be0000 using MAC address from ROM
eth0: ethernet@30be0000
Hit any key to stop autoboot:  0
"

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>