drm/i915: correct the input parameter on _intel_dsb_commit()

Current, the dewake_scanline variable is defined as unsigned int,
an unsigned int variable that is always greater than or equal to 0.
when _intel_dsb_commit function is called by intel_dsb_commit function,
the dewake_scanline variable may have an int value.
So the dewake_scanline variable is necessary to defined as an int.

Fixes: f83b94d ("drm/i915/dsb: Use DEwake to combat PkgC latency")
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Cc: Ville Syrjälä <[email protected]>
Cc: Uma Shankar <[email protected]>
Signed-off-by: heminhong <[email protected]>
Reviewed-by: Jani Nikula <[email protected]>
Signed-off-by: Jani Nikula <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit ef32c3c)
Signed-off-by: Jani Nikula <[email protected]>

Author: heminhong

drivers/gpu/drm/i915/display/intel_dsb.c

@@ -340,7 +340,7 @@ static int intel_dsb_dewake_scanline(const struct intel_crtc_state *crtc_state)
 }
 
 static void _intel_dsb_commit(struct intel_dsb *dsb, u32 ctrl,
-			      unsigned int dewake_scanline)
+			      int dewake_scanline)
 {
 	struct intel_crtc *crtc = dsb->crtc;
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);