dzn: fix pointer type mismatch

dzn: fix pointer type mismatch

    ../src/microsoft/vulkan/dzn_image.c: In function ‘dzn_GetImageMemoryRequirements2’:
    ../src/microsoft/vulkan/dzn_image.c:918:91: error: passing argument 6 of ‘dzn_ID3D12Device12_GetResourceAllocationInfo3’ from incompatible pointer type [-Werror=incompatible-pointer-types]
      918 |                                                            &image->castable_format_count, &image->castable_formats,
          |                                                                                           ^~~~~~~~~~~~~~~~~~~~~~~~
          |                                                                                           |
          |                                                                                           DXGI_FORMAT **
    In file included from ../src/microsoft/vulkan/dzn_private.h:67,
                     from ../src/microsoft/vulkan/dzn_image.c:24:
    ../src/microsoft/vulkan/dzn_abi_helper.h:64:107: note: expected ‘const DXGI_FORMAT * const*’ but argument is of type ‘DXGI_FORMAT **’
       64 |                                               const UINT *num_castable_formats, const DXGI_FORMAT *const *castable_formats,
          |                                                                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
    cc1: some warnings being treated as errors
    ninja: build stopped: subcommand failed.

Fixes: 71dbb3120a9d0fb0de32 ("dzn: Use GetResourceAllocationInfo3 for castable formats")
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22877>