[media] it913x ver 1.09 support for USB 1 devices (IT9135)

IT9135 devices do support USB 1.
Support added with restricton on pid count to 5.
IT9137 devices wil not connect in USB 1 mode.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>