pvr: enable samplerMirrorClampToEdge feature

This is forgotten when advertising the corresponding extension, which
leads to inconsistency, thus fail of
dEQP-VK.api.info.vulkan1p2.feature_extensions_consistency CTS testcase.

Enable the corresponding feature too. I ran all CTS tests with
"mirror_clamp_to_edge" in name, which are all skipped with NotSupported
before (because of the feature being not advertised), and gain
3695/11140 Pass with the remaining ones still NotSupported (no Fail).

This also makes the feature extension consistency CTS testcase Pass too.

Fixes: 4d34c07b7a ("pvr: advertise VK_KHR_sampler_mirror_clamp_to_edge")
Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
Reviewed-by: Frank Binns <frank.binns@imgtec.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38653>
(cherry picked from commit ab9e148bfb)

Conflicts:
	src/imagination/vulkan/pvr_physical_device.c
        (File has been renamed since branchpoint)

.pick_status.json

@@ -2414,7 +2414,7 @@
         "description": "pvr: enable samplerMirrorClampToEdge feature",
         "nominated": true,
         "nomination_type": 2,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": "4d34c07b7a9f58e92061844a378ceaf2f737c27a",
         "notes": null

src/imagination/vulkan/pvr_device.c

@@ -322,7 +322,7 @@ static void pvr_physical_device_get_supported_features(
       .samplerYcbcrConversion = false,
 
       /* Vulkan 1.2 */
-      .samplerMirrorClampToEdge = false,
+      .samplerMirrorClampToEdge = true,
       .drawIndirectCount = false,
       .storageBuffer8BitAccess = false,
       .uniformAndStorageBuffer8BitAccess = false,