1) Renames routine to conform to kernel naming conventions.
2) Relocates routine declaration to include files for
non-public nanokernel APIs.
3) Relocates routine definition so that it resides with the
nanokernel's other fiber manipulation routines.
4) Eliminates an unnecessary argument to the routine.
Change-Id: Ia139280dfea36262ca8417708786b4989f3eaee1
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>