pinctrl: sprd: Change to use devm_platform_ioremap_resource()

The devm_platform_ioremap_resource() function wraps platform_get_resource()
and devm_ioremap_resource() in a single helper, thus use it to simplify
the code.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Link: https://lore.kernel.org/r/ff410d312ed0047b5a36e5113daf7df78bcf1aa8.1564048446.git.baolin.wang@linaro.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/sprd/pinctrl-sprd.c

@@ -1020,7 +1020,6 @@ int sprd_pinctrl_core_probe(struct platform_device *pdev,
 	struct sprd_pinctrl *sprd_pctl;
 	struct sprd_pinctrl_soc_info *pinctrl_info;
 	struct pinctrl_pin_desc *pin_desc;
-	struct resource *res;
 	int ret, i;
 
 	sprd_pctl = devm_kzalloc(&pdev->dev, sizeof(struct sprd_pinctrl),
@@ -1028,8 +1027,7 @@ int sprd_pinctrl_core_probe(struct platform_device *pdev,
 	if (!sprd_pctl)
 		return -ENOMEM;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	sprd_pctl->base = devm_ioremap_resource(&pdev->dev, res);
+	sprd_pctl->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(sprd_pctl->base))
 		return PTR_ERR(sprd_pctl->base);