thermal: exynos_tmu: fix wrong error check for mapped memory

The error check is checking for a "base" mapped memory base
instead of "base_common". Fixing the same.

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index ec01dfe..a033dbb 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -592,7 +592,7 @@
 
 	data->base_common = devm_ioremap(&pdev->dev, res.start,
 					resource_size(&res));
-	if (!data->base) {
+	if (!data->base_common) {
 		dev_err(&pdev->dev, "Failed to ioremap memory\n");
 		return -ENOMEM;
 	}