usbplug: Support scanning storage

Provide default scan list and support customized scan
list based on specific chips.

Change-Id: I8563954733b8c76b28f565e79654c635a1705588
Signed-off-by: Jon Lin <jo

usbplug: Support scanning storage

Provide default scan list and support customized scan
list based on specific chips.

Change-Id: I8563954733b8c76b28f565e79654c635a1705588
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>

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usbplug: add vendor storage support

Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Change-Id: I49db9915144f2be43d1dd1d0c9f450e1ad84cbcc