arm: bcm235xx: choose 8-bit phy bus width

The Kona PHY supports an 8-bit wide UTMI interface,
therefore, choose this Kconfig setting.

Signed-off-by: Steve Rae <srae@broadcom.com>
diff --git a/configs/bcm23550_w1d_defconfig b/configs/bcm23550_w1d_defconfig
index 3328e51..cd47cd0 100644
--- a/configs/bcm23550_w1d_defconfig
+++ b/configs/bcm23550_w1d_defconfig
@@ -17,6 +17,7 @@
 CONFIG_USB=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_DWC2_OTG=y
+CONFIG_USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8=y
 CONFIG_USB_GADGET_DOWNLOAD=y
 CONFIG_G_DNL_MANUFACTURER="Broadcom Corporation"
 CONFIG_G_DNL_VENDOR_NUM=0x18d1