rtl8187: updating Kconfig with info of branded devices

Adding more detailed info about Asus motherboards and Ralink devices.

Signed-off-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>