staging: wilc1000: removes usused PRINT_XX(region...)

This patch removes unused PRINT_XX(region...)
because already removed in used to region feature of whole wilc source.
Also, removes unnecessary related region extern variable.

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