radv: Add driconf to force wave64 for RT

...and enable it for Hellblade: Senua's Sacrifice.

Reviewed-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23585>

src/util/00-radv-defaults.conf

@@ -156,6 +156,12 @@ Application bugs worked around in this file:
             <option name="radv_app_layer" value="metroexodus" />
         </application>
 
+        <application name="Hellblade: Senua's Sacrifice" application_name_match="HellbladeGame-Win64-Shipping.exe">
+            <!-- RT shaders in Hellblade: Senua's Sacrifice cause misrenders because they assume full subgroups.
+                 This is only guaranteed with wave64, so force wave64 on for this game. -->
+            <option name="radv_rt_wave64" value="true" />
+        </application>
+
         <!-- OpenGL Game workarounds (zink) -->
         <application name="Black Geyser: Couriers of Darkness" executable="BlackGeyser.x86_64">
             <option name="radv_zero_vram" value="true" />

src/util/driconf.h

@@ -645,6 +645,10 @@
    DRI_CONF_OPT_B(radv_flush_before_timestamp_write, def, \
                   "Wait for previous commands to finish before writing timestamps")
 
+#define DRI_CONF_RADV_RT_WAVE64(def) \
+   DRI_CONF_OPT_B(radv_rt_wave64, def, \
+                  "Force wave64 in RT shaders")
+
 #define DRI_CONF_RADV_APP_LAYER() DRI_CONF_OPT_S_NODEF(radv_app_layer, "Select an application layer.")
 
 /**