drm/i915/dg2: Correct DSS check for Wa_1308578152

When converting our DSS masks to bitmaps, we fumbled the condition used
to check whether any DSS are present in the first gslice.  Since
intel_sseu_find_first_xehp_dss() returns a 0-based number, we need a >=
condition rather than >.

Fixes: b87d3901 ("drm/i915/sseu: Disassociate internal subslice mask representation from uapi")
Reported-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Acked-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220607154724.3155521-1-matthew.d.roper@intel.com

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

@@ -2062,7 +2062,7 @@ engine_fake_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 
 static bool needs_wa_1308578152(struct intel_engine_cs *engine)
 {
-	return intel_sseu_find_first_xehp_dss(&engine->gt->info.sseu, 0, 0) >
+	return intel_sseu_find_first_xehp_dss(&engine->gt->info.sseu, 0, 0) >=
 		GEN_DSS_PER_GSLICE;
 }