staging: wilc1000: removes unnecessary retry 3 times

This patch removes unnecessary retry 3 times and related variable.
Actually the retry 3 times sentence, don't retry at all.
Repeats conditions are that until read a chip-id and written a register.

Signed-off-by: Leo Kim <leo.kim@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>