drm/i915/dsb: Move DSB ID definition to the header

We're going to need to make the DSB ID visible outside the DSB
code, so that we eg. can use multiple DSB engines in parallel.
to that end move the definition to intel_dsb.h.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240531114101.19994-3-ville.syrjala@linux.intel.comReviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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

@@ -18,14 +18,6 @@
 
 #define CACHELINE_BYTES 64
 
-enum intel_dsb_id {
-	INTEL_DSB_0,
-	INTEL_DSB_1,
-	INTEL_DSB_2,
-
-	I915_MAX_DSBS,
-};
-
 struct intel_dsb {
 	enum intel_dsb_id id;
 

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

@@ -14,6 +14,14 @@ struct intel_crtc;
 struct intel_crtc_state;
 struct intel_dsb;
 
+enum intel_dsb_id {
+	INTEL_DSB_0,
+	INTEL_DSB_1,
+	INTEL_DSB_2,
+
+	I915_MAX_DSBS,
+};
+
 struct intel_dsb *intel_dsb_prepare(const struct intel_crtc_state *crtc_state,
 				    unsigned int max_cmds);
 void intel_dsb_finish(struct intel_dsb *dsb);