drm/i915/display: Update small joiner ram size

Xelpd supports larger small joiner ram.
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210805101937.14664-1-vandita.kulkarni@intel.com

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

@@ -531,7 +531,9 @@ u32 intel_dp_mode_to_fec_clock(u32 mode_clock)
 static int
 small_joiner_ram_size_bits(struct drm_i915_private *i915)
 {
-	if (DISPLAY_VER(i915) >= 11)
+	if (DISPLAY_VER(i915) >= 13)
+		return 17280 * 8;
+	else if (DISPLAY_VER(i915) >= 11)
 		return 7680 * 8;
 	else
 		return 6144 * 8;