fvp_mps2.jinja2, fvp_mps3.jinja2: Bump --cpulimit to 180

There were cases seen in production when older limit of 130 was hit mid-way
thru tests.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I6a595805d8388d33a762ab3b7cf6b42c60396abe
2 files changed