agx: Emit global memory barriers for images

This is part of image atomics, since those go through the regular memory path.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24258>

src/asahi/compiler/agx_compile.c

@@ -1086,7 +1086,7 @@ agx_emit_intrinsic(agx_builder *b, nir_intrinsic_instr *instr)
       if (nir_intrinsic_memory_scope(instr) != SCOPE_NONE) {
          nir_variable_mode modes = nir_intrinsic_memory_modes(instr);
 
-         if (modes & nir_var_mem_global)
+         if (modes & (nir_var_mem_global | nir_var_image))
             agx_memory_barrier(b);
 
          if (modes & nir_var_mem_shared)