USB: HID: Steelseries SRW-S1 Add support for dials

This patch to the SRW-S1 driver re-writes the HID descriptor
to insert a section for the 3 dials on the device, previously
these were contained within a 'Manufacturer Specific' usage
page.

Signed-off-by: Simon Wood <simon@mungewell.org>
Tested-by: John Murphy <rosegardener@freeode.co.uk>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>