USB: dwc3: gadget: Handle ENDPOINT CLEAR FEATURE reqeust

When mass storage function driver receives invalid class specific
request, stalls particular bulk endpoint. When Host sends mass storage
reset, as part of handling class specific reset, mass storage driver
requests Device controller driver for clearing endpoint halt. But DCD
is not clearing endpoint halt due to unwanted condition check and
results in MSC complaince tests fail. Fix this by removing unwanted
condition check.

Change-Id: I3b98e74dc940d538d7014348f03be15b3218f70c
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>