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_gpu_memcpy.c

@@ -52,10 +52,10 @@ gcd_pow2_u64(uint64_t a, uint64_t b)
 }
 
 void
-genX(cmd_buffer_gpu_memcpy)(struct anv_cmd_buffer *cmd_buffer,
-                            struct anv_bo *dst, uint32_t dst_offset,
-                            struct anv_bo *src, uint32_t src_offset,
-                            uint32_t size)
+genX(cmd_buffer_so_memcpy)(struct anv_cmd_buffer *cmd_buffer,
+                           struct anv_bo *dst, uint32_t dst_offset,
+                           struct anv_bo *src, uint32_t src_offset,
+                           uint32_t size)
 {
    if (size == 0)
       return;