Add Eurocom Sky MX5 support.

[cono]

Improve dmidecode parsing, as dmidecode prints warning for me and
system-product-name validation fails.

% sudo dmidecode -q -s system-product-name            
# SMBIOS implementations newer than version 2.8 are not
# fully supported by this version of dmidecode.
SKY MX5

Delete SMBus.close as I don't see this method in SMBus class.

Traceback (most recent call last):
  File "./init-headphone", line 148, in <module>
    success = init_headphone()
  File "./init-headphone", line 144, in init_headphone
    i2c_bus.close()

[letitz]

First off, thanks for contributing!
I wonder, does unrud's latest code work for you? This repo is just a fedora packaging of his original fix, so I think the way to go is to submit this PR upstream, and I can merge in his updates.

[cono]

Actually already got reply from Unrud that he has this fix applied before and your script just outdated. And yes his current version works fine for my laptop. So merging his changes to your repo would be perfect.
And I'm closing this merge request.
Thanks! :)

[letitz]

I just updated the repo to reflect unrud's master. Can you test it and see if it works for you?