* arch-utils.c, arch-utils.h (default_convert_from_func_ptr_addr):

	* arch-utils.c, arch-utils.h (default_convert_from_func_ptr_addr):
	New function.
	* gdbarch.sh (CONVERT_FROM_FUNC_PTR_ADDR):  Add.
	* gdbarch.c, gdbarch.h:  Regenerate.
	* valops.c (find_function_addr):  Use CONVERT_FROM_FUNC_PTR_ADDR
	unconditionally.

	* config/rs6000/tm-rs6000.h (CONVERT_FROM_FUNC_PTR_ADDR):  Delete
	definition.
	* config/powerpc/tm-linux.h (CONVERT_FROM_FUNC_PTR_ADDR):  Remove
	undef.
	* rs6000-tdep.c (rs6000_convert_from_func_ptr_addr):  Fix comment.
	(rs6000_gdbarch_init):  Register rs6000_convert_from_func_ptr_addr
	if not ELFOSABI_LINUX.