Exclude .svg files from lint checks

[ved-rivos]

Describe your idea.
The build scripts do various checks like "no newline" on .svg files. SInce these are not human readable files, files of this type could be excluded.

Describe why it is important
A clear and concise description of what this will solve

Additional context
Add any other context or screenshots about the feature request here.

[kbroch-rivosinc]

Yes I should have done this for recent PR in iommu. Here's new PR: riscv-non-isa/riscv-iommu#347

general docs for this here: https://pre-commit.com/index.html#hooks-exclude

[ved-rivos]

Thanks!