USB: QTI: Add missing usb_ctrl_qti.h

f_gsi compilation is failing with below error:
fatal error: linux/usb/usb_ctrl_qti.h: No such file or directory

Hence add missing usb_ctrl_qti.h to resolve above error while
compiling f_gsi.c file.

This file's snapshot is taken from msm-3.18 kernel as
'commit 24b986908cc1 ("power: qpnp-fg: stop IMA transactions
during FG shutdown")'.

CRs-Fixed: 1001469
Change-Id: Ib7dce6b2ae1670554a29847e4381e71ba7b75edf
Signed-off-by: Mayank Rana <mrana@codeaurora.org>