linux-gbmc: aspeed-g7: edaf: device driver for moving data

Add a device driver to move the blob to the given reserved memory.

Tested:
````
// device nodes for dual nodes created successfully.
:~# ls -la /dev/edaf-map*
crw-------    1 root     root      248,   0 Jul 10 23:14 /dev/edaf-map0
crw-------    1 root     root      247,   0 Jul 10 23:14 /dev/edaf-map1
```
Google-Bug-Id: 401416725
Change-Id: I8fd15c3c027dee540049855e6907a9cd734a80a6
Signed-off-by: wukaihua <eason.kh.wu@fii-na.corp-partner.google.com>