panfrost: Add empty tile flags to GenXML

These flags control special CRC handling for empty tiles using the CRC
clear colour field added on Bifrost. Their use depends on CRC being
used. We missed these flags earlier; let's add them since they are used
by the Valhall DDK but are not new to Valhall.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13982>

src/panfrost/lib/genxml/v6.xml

@@ -1024,6 +1024,8 @@
     <field name="Z Preload Enable" size="1" start="12:19" type="bool"/>
     <field name="Z Unload Enable" size="1" start="12:20" type="bool"/>
     <field name="Has ZS CRC Extension" size="1" start="12:21" type="bool"/>
+    <field name="Empty Tile Read Enable" size="1" start="12:28" type="bool"/>
+    <field name="Empty Tile Write Enable" size="1" start="12:29" type="bool"/>
     <field name="CRC Read Enable" size="1" start="12:30" type="bool"/>
     <field name="CRC Write Enable" size="1" start="12:31" type="bool"/>
     <field name="Z Clear" size="32" start="13:0" type="float"/>

src/panfrost/lib/genxml/v7.xml

@@ -1072,6 +1072,8 @@
     <field name="Z Preload Enable" size="1" start="12:19" type="bool"/>
     <field name="Z Unload Enable" size="1" start="12:20" type="bool"/>
     <field name="Has ZS CRC Extension" size="1" start="12:21" type="bool"/>
+    <field name="Empty Tile Read Enable" size="1" start="12:28" type="bool"/>
+    <field name="Empty Tile Write Enable" size="1" start="12:29" type="bool"/>
     <field name="CRC Read Enable" size="1" start="12:30" type="bool"/>
     <field name="CRC Write Enable" size="1" start="12:31" type="bool"/>
     <field name="Z Clear" size="32" start="13:0" type="float"/>