x86/entry: Change stale function name in comment to error_return()

Correct old function name error_exit() in the comment to what it is now
called: error_return().

  [ bp: Provide a commit message and massage. ]
Signed-off-by: Jingyu Wang <jingyuwang_vip@163.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20220618154238.27749-1-jingyuwang_vip@163.com

arch/x86/entry/entry_64.S

@@ -1027,7 +1027,7 @@ SYM_CODE_START_LOCAL(paranoid_exit)
 	 *
 	 * NB to anyone to try to optimize this code: this code does
 	 * not execute at all for exceptions from user mode. Those
-	 * exceptions go through error_exit instead.
+	 * exceptions go through error_return instead.
 	 */
 	RESTORE_CR3	scratch_reg=%rax save_reg=%r14