spi: cadence-quadspi: remove unnecessary (void *) casts

Remove a couple of unnecessary casts to `(void *)` when initializing the
`.data` members in the device ID table.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20220510115141.212779-3-abbotti@mev.co.uk


Signed-off-by: Mark Brown <broonie@kernel.org>