usb: dwc3: Align DWC3_EP_* flag macros

Fix the DWC3_EP_* flag macros so that the definitions are all
lined up on the same tab column for consistent style.

No functional change.
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Link: https://lore.kernel.org/r/20211021180129.27938-2-jackp@codeaurora.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>