drm/i915: pass dev_priv explicitly to PSR2_MAN_TRK_CTL

Avoid the implicit dev_priv local variable use, and pass dev_priv
explicitly to the PSR2_MAN_TRK_CTL register macro.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/72934c8ac3a923ca0c12fc6cdeec1e0b87ecc4a4.1714471597.git.jani.nikula@intel.com


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