* mips-tdep.c (MIPS16_INSTLEN): Define.

	* mips-tdep.c (MIPS16_INSTLEN): Define.
	(mips_find_saved_regs): Replace hardcoded 2's with MIPS16_INSTLEN.
	(heuristic_proc_start): Recognize 'entry' pseudo-op as a start
	of function on MIPS16.
	(mips32_skip_prologue, mips16_skip_prologue): New helper functions
	for mips_skip_prologue.
	(mips_skip_prologue): Recognize both 16- and 32-bit prologues.