Removed reference specifiers in 'spvFMul*' functions to avoid address specifiers.
Removed reference specifiers in 'spvFMul*' functions to avoid address specifiers.

KhronosGroup/SPIRV-Cross,KhronosGroup/SPIRV-Cross,KhronosGroup/SPIRV-Cross,KhronosGroup/SPIRV-Cross,KhronosGroup/SPIRV-Cross,KhronosGroup/SPIRV-Cross