arm64: layerscape: Move CONFIG_HAS_FSL_DR_USB to Kconfig

Rename to USB_EHCI_FSL, use Kconfig to select ehci accordingly.

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index c79f866..90b2f78 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -186,6 +186,12 @@
 	---help---
 	  Enables support for generic EHCI controller.
 
+config USB_EHCI_FSL
+	bool  "Support for FSL on-chip EHCI USB controller"
+	default n
+	select  CONFIG_EHCI_HCD_INIT_AFTER_RESET
+	---help---
+	  Enables support for the on-chip EHCI controller on FSL chips.
 endif # USB_EHCI_HCD
 
 config USB_OHCI_HCD