Staging: sxg: Add Rev B support in the Sahara SXG driver

This patch makes the Sahara SXG driver use Rev B firmware instead of Rev A.
The firmware version is 1.71

Signed-off-by: Michael Miles <mmiles@alacritech.com>
Signed-off-by: Mithlesh Thukral <mithlesh@linsyssoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>