Wolfram contributed this driver in 2016. He is not using it anymore and
confirmed it to be removed.

It is hard to find hardware around the globe. When it is offered it is
expensive and performance is low.

Remove unused driver.

Link: https://lore.kernel.org/linux-staging/igi27iwrzg3ovgj3sym4gsi45timpkt4vkl5ss5dbftdzat6p4@ctxcjocvunpt/Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20240728052552.GA8748@matrix-ESPRIMO-P710Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>