ARM: imx: Convert mccmon6 to use DM/DTS in the u-boot proper

This commit converts mccmon6's u-boot proper (in a single commit to avoid
build breaks) to use solely DM/DTS.

The DTS description of the mccmon6 has been ported from Linux kernel
(v4.20, SHA1: 8fe28cb58bcb235034b64cbbb7550a8a43fd88be)

Signed-off-by: Lukasz Majewski <lukma@denx.de>
7 files changed