staging: nvec: make use of devm_platform_ioremap_resource

fix below issue reported by coccicheck
drivers/staging//nvec/nvec.c:794:1-5: WARNING: Use
devm_platform_ioremap_resource for base

Signed-off-by: Hariprasad Kelam <[e-mail]>
Acked-by: Marc Dietrich <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/nvec/nvec.c

···
 	struct device *dev = &pdev->dev;
 	struct nvec_chip *nvec;
 	struct nvec_msg *msg;
-	struct resource *res;
 	void __iomem *base;
 	char	get_firmware_version[] = { NVEC_CNTL, GET_FIRMWARE_VERSION },
 		unmute_speakers[] = { NVEC_OEM0, 0x10, 0x59, 0x95 },
···
 		return -ENODEV;
 	}
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	base = devm_ioremap_resource(dev, res);
+	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);