Fix LS421DE device tree.

[Ishibasystems]

This fixes includes:

• Change LED name ls421de:red:func to ls421de:red:alarm.
• Change LED name ls421de:white:info to ls421de:orange:info.
• Add LED support for ls421de:red:func.
• Change FAN speed parameters for 2400 RPM models e.g. U60R12MLAB-5*
• Fix LED name of lsmonitor-unified.

[1000001101000]

I'm maintaining a set of device trees for these devices which I believe address these issues.

Check out: https://github.com/1000001101000/Debian_on_Buffalo

[Ishibasystems]

Thanks. You've done a great job.