dynamic_debug: add wildcard support to filter files/functions/modules

This patch add wildcard '*' and '?' support when qurying debug flags.
Sometimes we may want open debug messages for specific foler(include subfolers), eg:
    echo "file drivers/usb/* +p" > <debugfs>/dynamic_debug/control

Signed-off-by: Du, Changbin <changbin.du@gmail.com>