tests/pm_rpm: find an appropriate CRTC instead of hardcoding CRTC 0
tests/pm_rpm: find an appropriate CRTC instead of hardcoding CRTC 0

BSW does not allow CRTC 0 to be used on every connector, so we need to
write code to actually find a suitable CRTC.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93124
Acked-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@ffwll.ch>
Signed-off-by: Paulo Zanoni <cc0e04a2103c45cd195651d976f79813d0f66bdf@intel.com>

tiagovignatti/intel-gpu-tools,tiagovignatti/intel-gpu-tools,tiagovignatti/intel-gpu-tools,tiagovignatti/intel-gpu-tools