f_sdp: Add high speed endpoint descriptor

Add HS endpoint descriptor for SDP. So that we can use high speed endpoint,
and the SDP device can send packet with 512 byte size.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>