[PATCH v2 6/8] board: tqma7: add code for u-boot with spl

[Feilke, Alexander]

Hi,

Please wait with applying the series. I just stumbled over a weird issue
related to the environment.

The default rootpath is set to `rootpath="/srv/nfs"` (with quotes).
This is wrong. Running `env default rootpath` will reset it correctly
to rootpath=/srv/nfs
However, `env default -fa` resets it back to `rootpath="/srv/nfs"`

Independently of that, the variables inside load_nfs are not being replaced
correctly. They appear to be empty, as I get `Filename '/'.` in the run log
when it should be something like `Filename '/srv/nfs/boot/imx7d-mba7.dtb'`

We will fix this before the patch should be accepted. The first issue seems
pretty weird tho. Any idea what might be causing this?

Thanks,
Alex