spi: nxp-fspi: Do not dereference fwnode in struct device

In order to make the underneath API easier to change in the future,
prevent users from dereferencing fwnode from struct device. Instead,
use the specific dev_fwnode() API for that.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220906161048.39953-1-andriy.shevchenko@linux.intel.comSigned-off-by: NMark Brown <broonie@kernel.org>

drivers/spi/spi-nxp-fspi.c

@@ -588,7 +588,7 @@ static int nxp_fspi_clk_prep_enable(struct nxp_fspi *f)
 {
 	int ret;
 
-	if (is_acpi_node(f->dev->fwnode))
+	if (is_acpi_node(dev_fwnode(f->dev)))
 		return 0;
 
 	ret = clk_prepare_enable(f->clk_en);
@@ -606,7 +606,7 @@ static int nxp_fspi_clk_prep_enable(struct nxp_fspi *f)
 
 static int nxp_fspi_clk_disable_unprep(struct nxp_fspi *f)
 {
-	if (is_acpi_node(f->dev->fwnode))
+	if (is_acpi_node(dev_fwnode(f->dev)))
 		return 0;
 
 	clk_disable_unprepare(f->clk);
@@ -1100,7 +1100,7 @@ static int nxp_fspi_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, f);
 
 	/* find the resources - configuration register address space */
-	if (is_acpi_node(f->dev->fwnode))
+	if (is_acpi_node(dev_fwnode(f->dev)))
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	else
 		res = platform_get_resource_byname(pdev,
@@ -1113,7 +1113,7 @@ static int nxp_fspi_probe(struct platform_device *pdev)
 	}
 
 	/* find the resources - controller memory mapped space */
-	if (is_acpi_node(f->dev->fwnode))
+	if (is_acpi_node(dev_fwnode(f->dev)))
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	else
 		res = platform_get_resource_byname(pdev,