Skip PMU tests on SGI-575

The PMU tests currently fail on SGI-575 platform. The root cause is unknown at
this point and some further investigation is needed.
Skip these tests in the meantime.

Signed-off-by: Petre-Ionut Tudor <petre-ionut.tudor@arm.com>
Change-Id: Ia43d1ccef8394e2ac8f08c28f32aa68cf045781a
1 file changed