radv: replace RADV_GFX12_HIZ_WA by a drirc option

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36174>

docs/envvars.rst

@@ -1619,19 +1619,6 @@ RADV driver environment variables
    ``peak``
       force GPU clocks to their maximum level, this is the default value
 
-.. envvar:: RADV_GFX12_HIZ_WA
-
-   choose the specific HiZ workaround to apply on GFX12 (RDNA4). The possible
-   values are:
-
-   ``disabled``
-     no HiZ workaround is enabled, use at your own risk but optimal for performance
-   ``partial``
-     mitigate the issue partially, potentially risky but performance should be
-     mostly optimal (default value)
-   ``full``
-     mitigate the issue completely, no risk but performance might be decreased
-
 .. envvar:: ACO_DEBUG
 
    a comma-separated list of named flags, which do various things:
@@ -1662,6 +1649,19 @@ RADV driver environment variables
    ``liveinfo``
       print liveness and register demand information before scheduling
 
+.. envvar:: radv_gfx12_hiz_wa
+
+   choose the specific HiZ workaround to apply on GFX12 (RDNA4). The possible
+   values are:
+
+   ``disabled``
+     no HiZ workaround is enabled, use at your own risk but optimal for performance
+   ``partial``
+     mitigate the issue partially, potentially risky but performance should be
+     mostly optimal (default value)
+   ``full``
+     mitigate the issue completely, no risk but performance might be decreased
+
 RadeonSI driver environment variables
 -------------------------------------