usb: dwc3: gadget: abolish trbs_left

Instead, we can always rely on dwc3_calc_trbs_left()
directly.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2016-08-24 14:37:22 +03:00
commit 7ae7df4982