usb: dwc2: debugfs: Print parameter no_clock_gating

usb: dwc2: debugfs: Print parameter no_clock_gating

The commit c4a0f7a6ab54 ("usb: dwc2: Skip clock gating on Samsung
SoCs") introduced a parameter to skip enabling clock gating mode
even the hardware platform should supports it.

In order to make this more visible also print this in show
parameters of debugfs.

Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/r/20240728130029.78279-3-wahrenst@gmx.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>