libutils: provide aeabi functions using softfloat

Configures Softfloat to be used with aeabi function to provide floating
point support for user TAs. CFG_TA_FLOAT_SUPPORT is set to y for arm32
platf

libutils: provide aeabi functions using softfloat

Configures Softfloat to be used with aeabi function to provide floating
point support for user TAs. CFG_TA_FLOAT_SUPPORT is set to y for arm32
platforms to indicate that floating support is enabled.

Reviewed-by: Pascal Brand <pascal.brand@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

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