Add starting parameters to rpmsg-remote, the test suite can run
rpmsg-remote with the "-t" parameter to avoid the infinite loop
and ensure other test case on linux console can run after the
test of rpmsg.

Issue-Id: SCM-5560
Signed-off-by: Jiacheng Tang <jiacheng.tang@arm.com>
Change-Id: I814b255e360ebc00bb5cf1d9479b4ba1a3d19bc3