Move get_call_rtx_from to final.c

Move get_call_rtx_from to final.c

Move get_call_rtx_from to final.c and call call_from_call_insn.

	PR other/120493
	* final.cc (call_from_call_insn): Change the argument type to
	const rtx_call_insn *.
	(get_call_rtx_from): New.
	* rtl.h (is_a_helper <const rtx_call_insn *>::test): New.
	(get_call_rtx_from): Moved to the final.cc section.
	* rtlanal.cc (get_call_rtx_from): Removed.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>