staging: ks7010: remove non-SDIO code and #ifdefs

I couldn't find any trace of code or even products using ks7010 with
something else than SDIO. So, remove the conditionals.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>