clk: mmp: mmp2: fix return value check in mmp2_clk_init()

BugLink: http://bugs.launchpad.net/bugs/1645453

commit a29e52a6 upstream.

Fix the retrn value check which testing the wrong variable
in mmp2_clk_init().

Fixes: 1ec770d9 ("clk: mmp: add mmp2 DT support for clock driver")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

drivers/clk/mmp/clk-of-mmp2.c

@@ -313,7 +313,7 @@ static void __init mmp2_clk_init(struct device_node *np)
 	}
 
 	pxa_unit->apmu_base = of_iomap(np, 1);
-	if (!pxa_unit->mpmu_base) {
+	if (!pxa_unit->apmu_base) {
 		pr_err("failed to map apmu registers\n");
 		return;
 	}