staging: ks7010: drop counting sd errors

They were counted but never really used anywhere. Also change the printk
to a debug print, since it mostly shows on the expected -ENOMEDIUM on
card removal.

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