Revert "usb: dwc3: gadget: skip Set/Clear Halt when invalid"

This reverts commit 3ccf60e1 ("usb: dwc3: gadget: skip Set/Clear
Halt when invalid") as some of host side applications send CLEAR HALT
request on opening of it without sending SET HALT which results into
host and device side USB goes out of sync for SeqN (in SS) or Data
Toggle (in HS). This result into host side application is not working.
Fix this issue by honoring CLEAR HALT request although previously SET
HALT request is not sent until host side applications are fixed.

Change-Id: I896d6e264e84af06dba32ab336fe2269f417b785
Signed-off-by: Mayank Rana <mrana@codeaurora.org>