msm: usb_bam: remove HSUSB/HSIC support

Remove obsolete code for special treatment of HSUSB/HSIC
specific controller HW. Also remove support for host mode BAM
which was only used for ChipIdea controller.

Change-Id: Ib3286e434fd1156014b07c90742f34460b00c657
Signed-off-by: Jack Pham <jackp@codeaurora.org>