UUU fails for i.MX8MM due to CC logic

Document created by MaxTsai Employee on Jul 8, 2019Last modified by MaxTsai Employee on Jul 15, 2019
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Several customers met uuu failure because their board doesn't use same CC logic (ptn5110) of i.MX8MM EVK. For this problem it's able to disable CC logic and to force device mode of u-boot. Shared the patch based on 4.14.78 for reference.

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