Kbuild: Always use $(PHASE_)

It is confusing to have both "$(PHASE_)" and "$(XPL_)" be used in our
Makefiles as part of the macros to determine when to do something in our
Makefiles based on what phase of the build we are in. For consistency,
bring this down to a single macro and use "$(PHASE_)" only.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/usb/cdns3/Makefile b/drivers/usb/cdns3/Makefile
index 1f00f23..dea5316 100644
--- a/drivers/usb/cdns3/Makefile
+++ b/drivers/usb/cdns3/Makefile
@@ -4,9 +4,9 @@
 
 obj-$(CONFIG_USB_CDNS3)			+= cdns3.o
 
-cdns3-$(CONFIG_$(XPL_)USB_CDNS3_GADGET)	+= gadget.o ep0.o
+cdns3-$(CONFIG_$(PHASE_)USB_CDNS3_GADGET)	+= gadget.o ep0.o
 
-cdns3-$(CONFIG_$(XPL_)USB_CDNS3_HOST)	+= host.o
+cdns3-$(CONFIG_$(PHASE_)USB_CDNS3_HOST)	+= host.o
 
 obj-$(CONFIG_USB_CDNS3_STARFIVE)	+= cdns3-starfive.o
 obj-$(CONFIG_USB_CDNS3_TI)		+= cdns3-ti.o
diff --git a/drivers/usb/common/Makefile b/drivers/usb/common/Makefile
index 11cc465..4c597c1 100644
--- a/drivers/usb/common/Makefile
+++ b/drivers/usb/common/Makefile
@@ -3,7 +3,7 @@
 # (C) Copyright 2016 Freescale Semiconductor, Inc.
 #
 
-obj-$(CONFIG_$(XPL_)DM_USB) += common.o
+obj-$(CONFIG_$(PHASE_)DM_USB) += common.o
 obj-$(CONFIG_USB_ISP1760) += usb_urb.o
 obj-$(CONFIG_USB_MUSB_HOST) += usb_urb.o
 obj-$(CONFIG_USB_MUSB_GADGET) += usb_urb.o
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index 985206e..a619cd3 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -6,11 +6,11 @@
 
 obj-$(CONFIG_USB_DWC3_GADGET)		+= gadget.o ep0.o
 
-obj-$(CONFIG_$(XPL_)USB_DWC3_AM62)	+= dwc3-am62.o
+obj-$(CONFIG_$(PHASE_)USB_DWC3_AM62)	+= dwc3-am62.o
 obj-$(CONFIG_USB_DWC3_OMAP)		+= dwc3-omap.o
 obj-$(CONFIG_USB_DWC3_MESON_G12A)	+= dwc3-meson-g12a.o
 obj-$(CONFIG_USB_DWC3_MESON_GXL)	+= dwc3-meson-gxl.o
-obj-$(CONFIG_$(XPL_)USB_DWC3_GENERIC)		+= dwc3-generic.o
+obj-$(CONFIG_$(PHASE_)USB_DWC3_GENERIC)		+= dwc3-generic.o
 obj-$(CONFIG_USB_DWC3_UNIPHIER)		+= dwc3-uniphier.o
 obj-$(CONFIG_USB_DWC3_LAYERSCAPE)	+= dwc3-layerscape.o
 obj-$(CONFIG_USB_DWC3_PHY_OMAP)		+= ti_usb_phy.o
diff --git a/drivers/usb/gadget/udc/Makefile b/drivers/usb/gadget/udc/Makefile
index 4b6a8fd..56b9b12 100644
--- a/drivers/usb/gadget/udc/Makefile
+++ b/drivers/usb/gadget/udc/Makefile
@@ -2,9 +2,9 @@
 #
 # USB peripheral controller drivers
 
-ifndef CONFIG_$(XPL_)DM_USB_GADGET
+ifndef CONFIG_$(PHASE_)DM_USB_GADGET
 obj-$(CONFIG_USB_DWC3_GADGET)	+= udc-core.o
 endif
 
-obj-$(CONFIG_$(XPL_)DM_USB_GADGET)	+= udc-core.o
+obj-$(CONFIG_$(PHASE_)DM_USB_GADGET)	+= udc-core.o
 obj-y += udc-uclass.o
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 902d68d..ef4ce62 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -3,7 +3,7 @@
 # (C) Copyright 2000-2007
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 
-ifdef CONFIG_$(XPL_)DM_USB
+ifdef CONFIG_$(PHASE_)DM_USB
 obj-y += usb-uclass.o
 obj-$(CONFIG_SANDBOX) += usb-sandbox.o
 endif