radv: replace an assertion with a conditional

Replace the !binding_layout->immutable_samplers assertion in
radv_update_descriptor_sets with a conditional.

The Vulkan specification does not say that it is illegal to update
a sampler descriptor when it is immutable; only that pImageInfo is
ignored.

This change is also needed for push descriptors, because valid
descriptors must be pushed for all bindings accessed by shaders,
including immutable sampler descriptors.

Signed-off-by: Fredrik Höglund <fredrik@kde.org>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

src/amd/vulkan/radv_descriptor_set.c

@@ -693,9 +693,9 @@ void radv_update_descriptor_sets(
 									!binding_layout->immutable_samplers);
 				break;
 			case VK_DESCRIPTOR_TYPE_SAMPLER:
-				assert(!binding_layout->immutable_samplers);
-				write_sampler_descriptor(device, ptr,
-							 writeset->pImageInfo + j);
+				if (!binding_layout->immutable_samplers)
+					write_sampler_descriptor(device, ptr,
+					                         writeset->pImageInfo + j);
 				break;
 			default:
 				unreachable("unimplemented descriptor type");