usb: host: u132-hcd: remove unneeded variable frame

This patch fixes below issue reported by coccicheck

drivers/usb/host/u132-hcd.c:2557:6-11: Unneeded variable: "frame".
Return "0" on line 2560

Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>