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/misc/Makefile b/drivers/misc/Makefile
index dac805e..4b62cd7 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -18,7 +18,7 @@
 obj-$(CONFIG_SANDBOX) += swap_case.o
 endif
 
-ifdef CONFIG_$(XPL_)DM_I2C
+ifdef CONFIG_$(PHASE_)DM_I2C
 ifndef CONFIG_XPL_BUILD
 obj-$(CONFIG_SANDBOX) += i2c_eeprom_emul.o
 obj-$(CONFIG_USB_HUB_USB251XB) += usb251xb.o
@@ -37,14 +37,14 @@
 obj-$(CONFIG_FSL_IFC) += fsl_ifc.o
 obj-$(CONFIG_FSL_IIM) += fsl_iim.o
 obj-$(CONFIG_FSL_SEC_MON) += fsl_sec_mon.o
-obj-$(CONFIG_$(XPL_)FS_LOADER) += fs_loader.o
+obj-$(CONFIG_$(PHASE_)FS_LOADER) += fs_loader.o
 obj-$(CONFIG_GATEWORKS_SC) += gsc.o
 obj-$(CONFIG_GDSYS_IOEP) += gdsys_ioep.o
 obj-$(CONFIG_GDSYS_RXAUI_CTRL) += gdsys_rxaui_ctrl.o
 obj-$(CONFIG_GDSYS_SOC) += gdsys_soc.o
 obj-$(CONFIG_IRQ) += irq-uclass.o
 obj-$(CONFIG_SANDBOX) += irq_sandbox.o irq_sandbox_test.o
-obj-$(CONFIG_$(XPL_)I2C_EEPROM) += i2c_eeprom.o
+obj-$(CONFIG_$(PHASE_)I2C_EEPROM) += i2c_eeprom.o
 obj-$(CONFIG_IHS_FPGA) += ihs_fpga.o
 obj-$(CONFIG_IMX8) += imx8/
 obj-$(CONFIG_IMX_ELE) += imx_ele/
@@ -52,14 +52,14 @@
 obj-$(CONFIG_LED_STATUS_GPIO) += gpio_led.o
 obj-$(CONFIG_MPC83XX_SERDES) += mpc83xx_serdes.o
 obj-$(CONFIG_$(PHASE_)LS2_SFP) += ls2_sfp.o
-obj-$(CONFIG_$(XPL_)MXC_OCOTP) += mxc_ocotp.o
+obj-$(CONFIG_$(PHASE_)MXC_OCOTP) += mxc_ocotp.o
 obj-$(CONFIG_MXS_OCOTP) += mxs_ocotp.o
 obj-$(CONFIG_NPCM_OTP) += npcm_otp.o
 obj-$(CONFIG_NPCM_HOST) += npcm_host_intf.o
 obj-$(CONFIG_NUVOTON_NCT6102D) += nuvoton_nct6102d.o
 obj-$(CONFIG_P2SB) += p2sb-uclass.o
 obj-$(CONFIG_PCA9551_LED) += pca9551_led.o
-obj-$(CONFIG_$(XPL_)PWRSEQ) += pwrseq-uclass.o
+obj-$(CONFIG_$(PHASE_)PWRSEQ) += pwrseq-uclass.o
 ifdef CONFIG_QFW
 obj-y += qfw.o
 obj-$(CONFIG_QFW_ACPI) += qfw_acpi.o