anv: fix internal compute copy shader build

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/9907
Fixes: 2cc5b3b1e0 ("anv: add a memcpy compute internal kernel")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25480>

src/intel/vulkan/anv_internal_kernels.h

@@ -135,6 +135,7 @@ struct anv_query_copy_params {
  */
 struct anv_memcpy_shader_params {
    uint32_t num_dwords;
+   uint32_t pad;
 };
 
 struct anv_memcpy_params {

src/intel/vulkan/shaders/memcpy_compute.glsl

@@ -39,6 +39,7 @@ layout(set = 0, binding = 1, std430) buffer Storage1 {
 /* This data will be provided through push constants. */
 layout(set = 0, binding = 2) uniform block {
    uint num_dwords;
+   uint pad;
 };
 
 void main()