drm/i915: Ensure wa_init_finish() is called for ctx workaround list

A recent restructuring of our context workaround list initialization
added an early return for non-render engines; this caused us to
potentially miss the wa_init_finish() call at the end of the function.
The mistake is pretty harmless --- the only impact is that non-render
engines on graphics version 12.50+ platforms we don't trim down the
workaround list to reclaim some memory, and we don't print the usual
"Initialized 1 context workaround" message in dmesg.  Let's change the
early return to a jump down to the wa_init_finish() call at the bottom
of the function.
Reported-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Fixes: 9e9dfd08 ("drm/i915/dg2: Maintain backward-compatible nested batch behavior")
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210826033559.1209020-1-matthew.d.roper@intel.com

drivers/gpu/drm/i915/gt/intel_workarounds.c

@@ -689,7 +689,7 @@ __intel_engine_init_ctx_wa(struct intel_engine_cs *engine,
 		fakewa_disable_nestedbb_mode(engine, wal);
 
 	if (engine->class != RENDER_CLASS)
-		return;
+		goto done;
 
 	if (IS_DG1(i915))
 		dg1_ctx_workarounds_init(engine, wal);
@@ -720,6 +720,7 @@ __intel_engine_init_ctx_wa(struct intel_engine_cs *engine,
 	else
 		MISSING_CASE(GRAPHICS_VER(i915));
 
+done:
 	wa_init_finish(wal);
 }