Allow linear swizzle mode with tiled image requests.

Mesa address lib faults if the only acceptable swizzle modes are
forbidden.  The old address lib simply ignored the forbidden list
in this case.  Mesa addrlib will not select linear unless there
is no other option so allowing linear mode for tiled images will
still use tiled modes when possible.

Change-Id: I1aa44d072db902c968484dbff67b482af03b45d9

runtime/hsa-runtime/image/image_manager_nv.cpp

@@ -629,8 +629,8 @@ uint32_t ImageManagerNv::GetAddrlibSurfaceInfoNv(
   prefSettingsInput.resourceLoction = ADDR_RSRC_LOC_UNDEF;
   prefSettingsInput.resourceType    = in.resourceType;
 
+  // Disallow all swizzles but linear.
   if (tileMode == Image::TileMode::LINEAR) {
-      // this should force linear.
       prefSettingsInput.forbiddenBlock.macroThin4KB = 1;
       prefSettingsInput.forbiddenBlock.macroThick4KB = 1;
       prefSettingsInput.forbiddenBlock.macroThin64KB = 1;
@@ -638,9 +638,8 @@ uint32_t ImageManagerNv::GetAddrlibSurfaceInfoNv(
       prefSettingsInput.forbiddenBlock.micro = 1;
       prefSettingsInput.forbiddenBlock.var = 1;
   } else {
-      // this should not allow linear.
-      prefSettingsInput.forbiddenBlock.linear = 1;
-      // Debug setting, simplifies buffer alignment.
+      // Debug setting, simplifies buffer alignment until language runtimes have official gfx10
+      // support.
       prefSettingsInput.forbiddenBlock.macroThin64KB = 1;
       prefSettingsInput.forbiddenBlock.macroThick64KB = 1;
   }