Revert "usb: host: Add support for usb core indexing"

This reverts commit 03a86f5c.

Remove support for usb core indexing since it is no longer
required to send controller number to remote client.

Change-Id: I8021c10037a668997782327e4c151d8cac2a2ebb
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>