rk3288 内核配置usb

针对rk3288内核配置usb，可以按照以下步骤进行配置：

1. 进入内核配置界面

make menuconfig

2. 选择USB支持

Device Drivers --->
    [*] USB support --->

3. 选择USB Gadget支持

<*> USB Gadget Support --->

4. 选择需要的Gadget功能

[*]   Ethernet Gadget (with CDC Ethernet support)
[*]   RNDIS Gadget (with CDC Ethernet support)
[*]   Mass Storage Gadget
[*]   HID Gadget
[*]   Audio Gadget
[*]   Serial Gadget (with CDC ACM support)
[*]   ConfigFS support

5. 选择USB OTG支持

<*> USB Dual-Role Controller Drivers --->
    <*> DesignWare USB2 DRD Core Support
    <*> DesignWare USB3 DRD Core Support
    <*> DWC2 Mode Selection (Dual Role mode)
    <*> DWC3 Mode Selection (Dual Role mode)

6. 选择USB Host支持

<*> USB Host Controller Drivers --->
    <*> xHCI HCD (USB 3.0) support
    <*> EHCI HCD (USB 2.0) support
    <*> OHCI HCD (USB 1.1) support

7. 保存配置并退出

make savedefconfig