USB: serial: option: add support for Cinterion PH8 and AHxx

[ Upstream commit 444f94e9e625f6ec6bbe2cb232a6451c637f35a3 ]

Added support for Gemalto's Cinterion PH8 and AHxx products
with 2 RmNet Interfaces and products with 1 RmNet + 1 USB Audio interface.

In addition some minor renaming and formatting.

Signed-off-by: Hans-Christoph Schemmel <hans-christoph.schemmel@gemalto.com>
[johan: sort current entries and trim trailing whitespace ]
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>