linux-qoriq: switch to locked down tarabll and update SRC_URI

Switch from git to locked down tarball. Tarball is hosted at S3
portal on Amazon server. Update SRC_URI to point to new location.

Signed-off-by: Fahad Arslan <Fahad_Arslan@mentor.com>
Merge pull request #400 from fahadarslan/update_src_uri

linux-qoriq: switch to locked down tarabll and update SRC_URI