aes-x86_64.pl: commit#19797 was overzealous, partially reverse.

crypto/aes/asm/aes-x86_64.pl

@@ -1552,8 +1552,8 @@ $code.=<<___;
 AES_set_decrypt_key:
 	push	%rbx
 	push	%rbp
-	push	%r12			# redundant, but allows to share
-	push	%r13			# exception handler...
+	push	%r12
+	push	%r13
 	push	%r14
 	push	%r15
 	push	%rdx			# save key schedule
@@ -1609,6 +1609,10 @@ $code.=<<___;
 
 	xor	%rax,%rax
 .Labort:
+	mov	8(%rsp),%r15
+	mov	16(%rsp),%r14
+	mov	24(%rsp),%r13
+	mov	32(%rsp),%r12
 	mov	40(%rsp),%rbp
 	mov	48(%rsp),%rbx
 	add	\$56,%rsp