Align compilation flag optee_os/optee_test(teetest)
Align compilation flag optee_os/optee_test(teetest)

Add plat-stm: use -mfloat-abi=soft
to fix VFP register register arguments error during testsuite linking.
It defines GCC to generate output containing library calls for floating-point operations.
optee_test(teetest) is statically linked with new client/linux driver so far.

Reviewed-by: Pascal Brand <0b55292d2562685bad4ce52d64f802e8f1cd299e@linaro.org>
Tested-by: Pascal Brand <0b55292d2562685bad4ce52d64f802e8f1cd299e@linaro.org> (STM platform)
Signed-off-by: Cedric Chaumont <8e86d8823993508e2add6a996501a29b179cbfca@st.com>

jamescfkung/optee_os,cedric-chaumont-st-dev/optee_os,BreezeWu/optee_os,pascal-brand-st-dev/optee_os,jamescfkung/optee_os,chshxi1989/optee_os,pascal-brand-st-dev/optee_os,matt2048/optee_os,Microsoft/optee_os,Microsoft/optee_os,cedric-chaumont-st-dev/optee_os,Microsoft/optee_os,BreezeWu/optee_os,chshxi1989/optee_os,pascal-brand-st-dev/optee_os,Microsoft/optee_os,chshxi1989/optee_os,cedric-chaumont-st-dev/optee_os,pascal-brand-st-dev/optee_os,chshxi1989/optee_os,jamescfkung/optee_os,BreezeWu/optee_os,jamescfkung/optee_os,matt2048/optee_os,cedric-chaumont-st-dev/optee_os,Microsoft/optee_os,jamescfkung/optee_os,BreezeWu/optee_os,matt2048/optee_os,BreezeWu/optee_os,chshxi1989/optee_os,matt2048/optee_os,pascal-brand-st-dev/optee_os