Add three new tests which try primary and sprite planes
next to each other with different plane formats, rotations
and tiling modes.

multiplane-rotation subtest run test through with both planes
fully visible.

multiplane-rotation-cropping-top will crop primary plane to
left/top corner and sprite plane to right/top corner while running
rotation tests.

multiplane-rotation-cropping-bottom will crop primary plane to
left/bottom corner and sprite plane to right/bottom corner while
running rotation tests.

v2 (Nautiyal, Ankit K): Use rectangular figures instead of
square figures and fix associated code to perform correctly.
Adjust plane positions according to screen size to avoid
putting planes outside screen.

v3 (Nautiyal, Ankit K): Minor detail fix.

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>