Remove CONFIG_SYS_MMC_IMG_LOAD_PART from CONFIG namespace

This option is used as part of configuring the default environment for a
number of platforms. However, it is always set to 1 and the only time
it is part of Kconfig, it is used in a hard-coded manner. Hard-code the
value in the environment instead.

Signed-off-by: Tom Rini <trini@konsulko.com>

arm: imx7d: add support for Compulab cl-som-imx7

Add initial support for Compulab cl-som-imx7 SoM.
The initial support includes:
- MMC
- eMMC
- SPI flash
- I2C
- FEC
- USB
- Serial console

Signed-off-by: Ilya Ledvich <ilya@compulab.co.il>

arm: imx7d: add support for Compulab cl-som-imx7

Add initial support for Compulab cl-som-imx7 SoM.
The initial support includes:
- MMC
- eMMC
- SPI flash
- I2C
- FEC
- USB
- Serial console

Signed-off-by: Ilya Ledvich <ilya@compulab.co.il>