rl78.c (rl78_expand_prologue): In G10 mode push the BC, DE and HL registers directly...

rl78.c (rl78_expand_prologue): In G10 mode push the BC, DE and HL registers directly, not via AX.

	* config/rl78/rl78.c (rl78_expand_prologue): In G10 mode push the
	BC, DE and HL registers directly, not via AX.
	When decrementing the stack pointer by a large amount, transfer SP
	into AX and perform the subtraction there.
	(rl78_expand_epilogue): Perform the inverse of the above
	enhancements.

From-SVN: r220163