hostap: proc: substitute loops by %*phN

For dumping small buffers we may use %*phN specifier instead of custom
approach..

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --cc drivers/net/wireless/hostap/hostap_proc.c
Simple merge