Commit 9e977832 authored by Haihao Xiang's avatar Haihao Xiang Committed by GStreamer Merge Bot

msdkh265enc: let MSDK select the encoding mode by default

MSDK may support lowpower and non-lowpower modes, some features are
available only under one of the two modes, which is hard to know for
user, so let MSDK select the mode by default.

Part-of: <!1405>
parent d6635346
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