Add support for 2 MCP2515 CAN bus Chips

[petit-miner]

I hope I made everything right.
The file was tested and it worked perfectly.

[pelwell]

This would be better as:

can1: mcp2515@1 {

[pelwell]

The rest of it looks fine. If you can fix the things I commented on, squash the commits down to one, and git push -f to update the PR, then I'll merge it.

[petit-miner]

How do I delete the commits and what I have to do next?
It is my first time I work with github and I dont know what I should do.

[pelwell]

If you have a set of commits like this then you can squash them on your Pi/PC using the "git rebase -i" command. Count how many commits you want to squash then write:

git rebase -i HEAD~n

where n is the number of commits. This will open your chosen editor with a sequence of commits, applied top to bottom, with a keyword (pick) saying what to do with it. If you change all but the first (i.e. from the second commit onwards) to squash then it will create a new commit covering them all, writing you a combined commit message. If the later commits don't add anything worth commenting on, then change the keywords to fixup instead.

When you have a single good commit then you can update the pull request using:

git push -f