usb: dwc3: Disable all interrupts during run_stop clear

Clearing DEVTEN register does not disable the
interrupts related to endpoint. These can be disabled
by setting the GEVNTSIZ_INTMASK bit of GEVNTSIZ register.
Hence, set this bit to disable all kinds of interrupts.

Change-Id: I5e26508e7a3b5a00873b76316311916135387e20
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>