tests: samples: revert timeout change for FVP BaseR

Partially revert commit 0028e9733295316d152eba07bf56677d83f4b1b5.
Timeout for tests/posix/common must be still increased for slow
platforms (previously was 120 sec).

Signed-off-by: Manuel Arguelles <manuel.arguelles@nxp.com>
3 files changed