drm/i915/psr: stop using bitwise OR with booleans in wm_optimization_wa()

Bitwise OR for booleans is a bit of an abuse. We can trivially drop the
usage.

Cc: Jouni Högander <jouni.hogander@intel.com>
Cc: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/f7ea5854c9a306f56f4142f8d37d567ee2f768a7.1730201504.git.jani.nikula@intel.com


Signed-off-by: Jani Nikula <jani.nikula@intel.com>