<h3>Contribution description</h3>
<ul>
<li>Moved VIC.c to irq_arch.c for consistent naming scheme</li>
<li>Removed unused functions IRQenabled, disableFIQ, restoreFIQ, enableFIQ
<ul>
<li>There is not header for those functions, so they <em>cannot</em> be used</li>
<li>These is obviously no user, as they <em>cannot</em> be used</li>
<li>There is absolutely no documentation what they would be used for</li>
</ul>
</li>
</ul>
<h3>Testing procedure</h3>
<p>Build, flash and run some randomly selected examples/tests for the MSB-A2. If there were running before, they should still do so.</p>
<h3>Issues/PRs references</h3>
<p>None</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/RIOT-OS/RIOT/pull/11911'>https://github.com/RIOT-OS/RIOT/pull/11911</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>cpu/arm7_common: Cleaned up IRQ code</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>R</strong>
    <a href="https://github.com/RIOT-OS/RIOT/pull/11911/files#diff-0">cpu/arm7_common/irq_arch.c</a>
    (37)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/RIOT-OS/RIOT/pull/11911.patch'>https://github.com/RIOT-OS/RIOT/pull/11911.patch</a></li>
  <li><a href='https://github.com/RIOT-OS/RIOT/pull/11911.diff'>https://github.com/RIOT-OS/RIOT/pull/11911.diff</a></li>
</ul>

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