UPSTREAM: usb: dwc2: Fix probe problem on bcm2835

UPSTREAM: usb: dwc2: Fix probe problem on bcm2835

Fixes an issue found on Raspberry PI platform that prevents probe. Don't
skip setting the force mode if it's already set.

Change-Id: I8fcef478dd4ad669cb3fc49d2308d126873213c7
Fixes: 09c96980dc72 ("usb: dwc2: Add functions to set and clear force mode")
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Reported-by: Stefan Wahren <stefan.wahren@i2se.com>
Reported-by: Remi Pommarel <repk@triplefau.lt>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Tested-by: Remi Pommarel <repk@triplefau.lt>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Huang, Tao <huangtao@rock-chips.com>
(cherry picked from commit 192cb07f7928e8cb09a9851e6c0f7478baa3bc6d)