ARM: sunxi: mc-smp: Fix "lookback" typo

The sunxi_mc_smp_lookback function is modeled after the mcpm_loopback
function in the MCPM framework. "lookback" was a typo introduced when
the new function was added.
Acked-by: NMaxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: NChen-Yu Tsai <wens@csie.org>

arch/arm/mach-sunxi/mc_smp.c

@@ -659,7 +659,7 @@ static int __init nocache_trampoline(unsigned long __unused)
 	BUG();
 }
 
-static int __init sunxi_mc_smp_lookback(void)
+static int __init sunxi_mc_smp_loopback(void)
 {
 	int ret;
 
@@ -749,7 +749,7 @@ static int __init sunxi_mc_smp_init(void)
 	}
 
 	/* Configure CCI-400 for boot cluster */
-	ret = sunxi_mc_smp_lookback();
+	ret = sunxi_mc_smp_loopback();
 	if (ret) {
 		pr_err("%s: failed to configure boot cluster: %d\n",
 		       __func__, ret);