SWDEV-465162 - Fix some issue with image support

Fix some small issues regarding image and mipmap support

Change-Id: I8e64223d44f37c2dbb115cbb343441a48021ba7b

rocclr/device/pal/palsettings.cpp

@@ -393,7 +393,7 @@ bool Settings::create(const Pal::DeviceProperties& palProp,
     enableExtension(ClKhrSubGroups);
     enableExtension(ClKhrDepthImages);
 
-    if (GPU_MIPMAP) {
+    if (GPU_MIPMAP && imageSupport_) {
       enableExtension(ClKhrMipMapImage);
       enableExtension(ClKhrMipMapImageWrites);
     }