Create folders for secure libmix decoder for CHT, Merr+ and Moorefield

BZ: 156066

The moorefield and merrplus folders copy the codes in merrifield as the
start point. The cherrytrail folder copy the codes in baytrail. The whole
secvideo folder structure is shown as below:

|-- baytrail
|-- cherrytrail
|-- clovertrail
|-- merrifield
|-- merrplus
`-- moorefield

Change-Id: I95e37ffd9deb312b5423f5e5abb060581625d94c
Signed-off-by: wfeng6 <>
10 files changed