USB: gadget: g_multi: added documentation and INF files

A short documentation of the g_multi driver along with INF
files for Windows XP SP3 are provided.

Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/Documentation/usb/linux-cdc-acm.inf b/Documentation/usb/linux-cdc-acm.inf
index 14d2b87..612e722 100644
--- a/Documentation/usb/linux-cdc-acm.inf
+++ b/Documentation/usb/linux-cdc-acm.inf
@@ -90,10 +90,10 @@
 [SourceDisksFiles]
 [SourceDisksNames]
 [DeviceList]
-%DESCRIPTION%=DriverInstall, USB\VID_0525&PID_A4A7
+%DESCRIPTION%=DriverInstall, USB\VID_0525&PID_A4A7, USB\VID_0525&PID_A4AB&MI_02
 
 [DeviceList.NTamd64]
-%DESCRIPTION%=DriverInstall, USB\VID_0525&PID_A4A7
+%DESCRIPTION%=DriverInstall, USB\VID_0525&PID_A4A7, USB\VID_0525&PID_A4AB&MI_02
 
 
 ;------------------------------------------------------------------------------