Revert "drivers: usb: gadget: Backport from caf-jb_mr1_chocolate"

This reverts commit 08478457159bc29626911efc40980f34053c3bb1.
Revert "USB: port USB and diag drivers from mrg666's kernel (master branch)"

This reverts commit f1da21dba486551bb8bafdb879886c6a642fab01.

Conflicts:
	arch/arm/configs/sultan_defconfig
sultan_defconfig: Refresh