Revert "usb: gadget: Allow PID and serial_num update on DT-targets"

This reverts commit 43c61a14e9826a35f063c946f8cb4fb50fee36cc.
Revert "usb: gadget: Add support for more than one configuration in android gadget"

This reverts commit 2a65e7c140d8d97d1fa4e14879c95860b65fabbc.

Change-Id: I7b0ac2c059ad2d621608c5e2b84a0f15e9d1e7e1
Revert "usb: gadget: Add support for multiple android gadgets"

This reverts commit 23dc77c36ac1d63e3c452f16592daa3fe0f9253a.