tests: kernel: interrupt: Exclude platforms test isnt valid on

The test assumes that the last to IRQ numbers will be free, this isn't a
valid assumption and now that we detect multiple ISRs registering for
the some IRQ line, we see failures because of this assumption on some
platforms.  Exclude those platforms from this test for the time being.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>