[cairo] [Pixman] FPU requirement in SoC based devices

[M.R.]

Floating point hardware is a reasonable requirement on a dedicated
SoC device that models some application-domain process that deals
with physical measurements and is thus by its nature best representable
with real numbers. But if the cost of hardware is critical and press
run is high, floating point should never be made necessary just to
reduce the display-driving software development cost, especially if
the only purpose of the display is man/machine interface (i.e., the
"control panel" display), not the visualization of some application-
-domain process.

Marko R.