USB: garmin_gps: removes usb_reset_device from garmin_close

The following patch removes the call to usb_reset_device which may occur
when closing the driver by implementing a new session initialization
code based on the method used by gpsbabel.

The patch is against  linux-2.6.30-rc3-git1.

Signed-off-by: Hermann Kneissel <herkne@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>