soc/intel: Use config_of()

Change-Id: I0727a6b327410197cf32f598d1312737744386b3
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34328
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: David Guckian
diff --git a/src/soc/intel/braswell/xhci.c b/src/soc/intel/braswell/xhci.c
index 6c90482..42288f9 100644
--- a/src/soc/intel/braswell/xhci.c
+++ b/src/soc/intel/braswell/xhci.c
@@ -33,9 +33,9 @@
 
 static void xhci_init(struct device *dev)
 {
-	struct soc_intel_braswell_config *config = dev->chip_info;
+	struct soc_intel_braswell_config *config = config_of(dev);
 
-	if (config && config->usb_comp_bg) {
+	if (config->usb_comp_bg) {
 		struct reg_script ops[] = {
 			REG_IOSF_WRITE(IOSF_PORT_USBPHY, USBPHY_COMPBG,
 				config->usb_comp_bg),