EHCI: HSIC: Add payload support for control transfers logging

Print first 16 bytes of control transfer's data to debug entries.
This is helpful in debugging QMI transactions.  The current code
determines the direction (IN/OUT) using ep descriptor.  This is
correct for all endpoints except ep0.  Use URB helper functions.

CRs-Fixed: 466603
Change-Id: I8bd3e7990259587aa026bd476ac5a4d5e7f049ca
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>