Build: Enable FP tests on AN521 & AN552 FVP

FPU feature is supported on AN521 & AN552 FVP now. And FPU
tests on Musca S1 and MPS2 SSE 200 are temporarily disabled
because of known issue. Enable FP tests on AN521 & AN552 FVP
so that FPU feature can be both built and tested on Open CI.

Signed-off-by: Jianliang Shen <jianliang.shen@arm.com>
Change-Id: I87039580fdc84e8102219d3fe26c9b60b0b102ad
2 files changed