[PATCH 1/1] math.h: Set HAVE_HW_FMA32 based on compiler provided macro

Fixes sin/cos piglits on non-FMA capable asics.
Bugzilla: https://bugs.llvm.org/show_bug.cgi?id=35983

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>

ping.
we need this to not use fma in sin/cos/tan on asics that don't have the
instruction.

Jan

Fixes sin/cos piglits on non-FMA capable asics.
Bugzilla: https://bugs.llvm.org/show_bug.cgi?id=35983

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>

LGTM.