x86, mpparse: Remove unnecessary variable

'ret' isn't used by check_slot(), gets initialized but has no real use,
so remove it.
Signed-off-by: NRakib Mullick <rakib.mullick@gmail.com>
LKML-Reference: <AANLkTikh3y+is3xixKBdyHhr_cHxzPFJF729Fcvt8+Ns@mail.gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/mpparse.c

@@ -722,14 +722,12 @@ inline void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare) {}
 static int
 check_slot(unsigned long mpc_new_phys, unsigned long mpc_new_length, int count)
 {
-	int ret = 0;
-
 	if (!mpc_new_phys || count <= mpc_new_length) {
 		WARN(1, "update_mptable: No spare slots (length: %x)\n", count);
 		return -1;
 	}
 
-	return ret;
+	return 0;
 }
 
 static int  __init replace_intsrc_all(struct mpc_table *mpc,