tpm_crb: Use IOMEM_ERR_PTR when function returns iomem

This is to simplify the code, and IOMEM_ERR_PTR(err) is same with
(__force void __iomem *)ERR_PTR(err).
Signed-off-by: NTian Tao <tiantao6@hisilicon.com>
Reviewed-by: NJarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: NJarkko Sakkinen <jarkko@kernel.org>

drivers/char/tpm/tpm_crb.c

@@ -464,7 +464,7 @@ static void __iomem *crb_map_res(struct device *dev, struct resource *iores,
 
 	/* Detect a 64 bit address on a 32 bit system */
 	if (start != new_res.start)
-		return (void __iomem *) ERR_PTR(-EINVAL);
+		return IOMEM_ERR_PTR(-EINVAL);
 
 	if (!iores)
 		return devm_ioremap_resource(dev, &new_res);