[PATCH, Committed] Add self to MAINTAINERS

[Prakhar Bahuguna]

I have added myself to the Write After Approval section of the MAINTAINERS
list.

ChangeLog:

2017-05-31  Prakhar Bahuguna  <prakhar.bahug...@arm.com>

        * MAINTAINERS: Add self to Write After Approval

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Prakhar Bahuguna