mmc: wmt-sdmmc: Use resource_size()

Author: Alexandru Gheorghiu <gheorghiuandru@gmail.com>

Used resource_size function instead of explicit computation.
Patch found using coccinelle.

Signed-off-by: Alexandru Gheorghiu 
Signed-off-by: Chris Ball 
---
 drivers/mmc/host/wmt-sdmmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 
diff --git a/drivers/mmc/host/wmt-sdmmc.c b/drivers/mmc/host/wmt-sdmmc.c
index 74cbc9a..442f576 100644
--- a/drivers/mmc/host/wmt-sdmmc.c
+++ b/drivers/mmc/host/wmt-sdmmc.c
@@ -923,7 +923,7 @@ static int wmt_mci_remove(struct platform_device *pdev)
 	clk_put(priv->clk_sdmmc);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(res->start, res->end - res->start + 1);
+	release_mem_region(res->start, resource_size(res));
 
 	mmc_free_host(mmc);