Heads' System Information is x86 centric

Nobody has claimed this yet.

`

Missing above:
- Firmware version
- CPU model
- Disk size
----

- for x86, CPU version can easily be obtained grepping "cpu model" from /proc/cpuinfo.
On Power, it seems that this is `model` only.

- x86:
`cat /proc/cpuinfo | grep "model name"|awk -F ":" {'print $2'} | uniq`
Intel(R) Core(TM) i7-3520M CPU @ 2.90GHz

- Power:
`cat /proc/cpuinfo | grep "model name"|awk -F ":" {'print $2'} | uniq`
nothing
`cat /proc/cpuinfo | grep "model"| awk -F ":" {'print $2'} | uniq`
`T2P9D01 REV 1.00`: not good. It's the motherboard, not the CPU.

-----

- FW_VER cannot be extracted from dmesg grepping DMI/BIOS information as on x86.
Both can have the firmware version extracted through coreboot console output with the following:
```
cbmem -1 | grep Heads | awk -F " " {'print $1'} | awk -F "--" {'print $NF'}
| uniq
```
Outputs: `Heads-v5.0.1-212-g585e581d`

Start by locating the existing system-information entry point that reads /proc/cpuinfo and firmware data, then compare the x86 and Power cases described in the issue. Use cbmem console output for the firmware version and verify that the displayed information includes firmware version, CPU model, and disk size on both platforms.

Written by the indexing model from the issue text.