Revert "Remove `exceptions` parameter from `normaliseround` VFP functions"

This reverts commit edf30d84.

Conflicts:
	src/core/arm/skyeye_common/vfp/vfp_helper.h
	src/core/arm/skyeye_common/vfp/vfpdouble.cpp
	src/core/arm/skyeye_common/vfp/vfpsingle.cpp