anv/gpu_memcpy: Rename the gpu_memcpy function

A GPU memcpy function could alternatively be implemented using MI_*
commands. Provide more detail into how this one operates in case another
memcpy function is created.

v2:
- Update the commit message.
v3:
- Use 'memcpy' instead of 'cpy' (Jason Ekstrand)
- Shorten 'streamout' to 'so'

Suggested-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com> (v2)
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/vulkan/genX_cmd_buffer.c

@@ -710,9 +710,9 @@ genX(CmdExecuteCommands)(
          struct anv_state dst_state = secondary->state.render_pass_states;
          assert(src_state.alloc_size == dst_state.alloc_size);
 
-         genX(cmd_buffer_gpu_memcpy)(primary, ss_bo, dst_state.offset,
-                                     ss_bo, src_state.offset,
-                                     src_state.alloc_size);
+         genX(cmd_buffer_so_memcpy)(primary, ss_bo, dst_state.offset,
+                                    ss_bo, src_state.offset,
+                                    src_state.alloc_size);
       }
 
       anv_cmd_buffer_add_secondary(primary, secondary);