FROMGIT: usb: dwc3: gadget: Disable Vendor Test LMP Received event

Some users questioned why Vendor Test LMP Received event was enabled.
The driver currently doesn't handle this event. Let's disable it to
avoid confusion.

Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/4e785ba5d5e95801b6fcf96116f6090216e70760.1610596478.git.Thinh.Nguyen@synopsys.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 132ee0da
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git

 usb-next)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I9c9ca7c84a07cc48fefc07491b2879d3d24a4aef