global: Rename SPL_ to XPL_

Use XPL_ as the symbol to indicate an SPL build. This means that SPL_ is
no-longer set.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 3c8c541..bc1e1ed 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0+
 
 ifeq ($(CONFIG_EFI_APP),)
-ifdef CONFIG_$(SPL_)X86_64
+ifdef CONFIG_$(XPL_)X86_64
 head-y := arch/x86/cpu/start64.o
 else
 ifeq ($(CONFIG_$(SPL_TPL_)X86_16BIT_INIT),y)
diff --git a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile
index c21d6d6..8899830 100644
--- a/arch/x86/cpu/Makefile
+++ b/arch/x86/cpu/Makefile
@@ -6,7 +6,7 @@
 # (C) Copyright 2002
 # Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
 
-ifeq ($(CONFIG_$(SPL_)X86_64),y)
+ifeq ($(CONFIG_$(XPL_)X86_64),y)
 extra-y	= start64.o
 else
 ifeq ($(CONFIG_$(SPL_TPL_)X86_16BIT_INIT),y)
@@ -31,7 +31,7 @@
 obj-y	+= cpu_x86.o
 endif
 
-ifndef CONFIG_$(SPL_)X86_64
+ifndef CONFIG_$(XPL_)X86_64
 AFLAGS_REMOVE_call32.o := -mregparm=3 \
 	$(if $(CONFIG_EFI_STUB_64BIT),-march=i386 -m32)
 AFLAGS_call32.o := -fpic -fshort-wchar \
@@ -59,18 +59,18 @@
 ifndef CONFIG_SYS_COREBOOT
 obj-$(CONFIG_$(SPL_TPL_)X86_32BIT_INIT) += irq.o
 endif
-ifndef CONFIG_$(SPL_)X86_64
-obj-$(CONFIG_$(SPL_)SMP) += mp_init.o
+ifndef CONFIG_$(XPL_)X86_64
+obj-$(CONFIG_$(XPL_)SMP) += mp_init.o
 endif
 obj-y += mtrr.o
 obj-$(CONFIG_PCI) += pci.o
-ifndef CONFIG_$(SPL_)X86_64
+ifndef CONFIG_$(XPL_)X86_64
 obj-$(CONFIG_SMP) += sipi_vector.o
 endif
 obj-y += turbo.o
 obj-$(CONFIG_HAVE_ACPI_RESUME) += wakeup.o
 
-ifeq ($(CONFIG_$(SPL_)X86_64),y)
+ifeq ($(CONFIG_$(XPL_)X86_64),y)
 obj-y += x86_64/
 else
 obj-y += i386/
diff --git a/arch/x86/cpu/intel_common/Makefile b/arch/x86/cpu/intel_common/Makefile
index 2e312a3..d2db589 100644
--- a/arch/x86/cpu/intel_common/Makefile
+++ b/arch/x86/cpu/intel_common/Makefile
@@ -26,10 +26,10 @@
 obj-y += fast_spi.o
 obj-y += lpc.o
 obj-y += lpss.o
-obj-$(CONFIG_$(SPL_)INTEL_GENERIC_WIFI) += generic_wifi.o
+obj-$(CONFIG_$(XPL_)INTEL_GENERIC_WIFI) += generic_wifi.o
 ifndef CONFIG_EFI_APP
 obj-$(CONFIG_$(SPL_TPL_)X86_32BIT_INIT) += microcode.o
-ifndef CONFIG_$(SPL_)X86_64
+ifndef CONFIG_$(XPL_)X86_64
 obj-y += microcode.o
 endif
 endif
diff --git a/arch/x86/cpu/ivybridge/Makefile b/arch/x86/cpu/ivybridge/Makefile
index 1f3b0c0..471ad8d 100644
--- a/arch/x86/cpu/ivybridge/Makefile
+++ b/arch/x86/cpu/ivybridge/Makefile
@@ -5,15 +5,15 @@
 ifdef CONFIG_HAVE_FSP
 obj-y += fsp_configs.o ivybridge.o
 else
-obj-$(CONFIG_$(SPL_)X86_32BIT_INIT) += cpu.o
+obj-$(CONFIG_$(XPL_)X86_32BIT_INIT) += cpu.o
 obj-y += early_me.o
 obj-y += lpc.o
 obj-y += northbridge.o
 ifndef CONFIG_XPL_BUILD
 obj-y += sata.o
 endif
-obj-$(CONFIG_$(SPL_)X86_32BIT_INIT) += sdram.o
-ifndef CONFIG_$(SPL_)X86_32BIT_INIT
+obj-$(CONFIG_$(XPL_)X86_32BIT_INIT) += sdram.o
+ifndef CONFIG_$(XPL_)X86_32BIT_INIT
 obj-y += sdram_nop.o
 endif
 endif
diff --git a/arch/x86/cpu/qemu/Makefile b/arch/x86/cpu/qemu/Makefile
index b7dd5bd..1439916 100644
--- a/arch/x86/cpu/qemu/Makefile
+++ b/arch/x86/cpu/qemu/Makefile
@@ -2,7 +2,7 @@
 #
 # Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
 
-ifndef CONFIG_$(SPL_)X86_64
+ifndef CONFIG_$(XPL_)X86_64
 obj-y += car.o
 endif
 obj-y += dram.o
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 2738f0b..53a9490 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -19,7 +19,7 @@
 obj-$(CONFIG_CMD_BOOTM) += bootm.o
 endif
 obj-y	+= cmd_boot.o
-obj-$(CONFIG_$(SPL_)COREBOOT_SYSINFO)	+= coreboot/
+obj-$(CONFIG_$(XPL_)COREBOOT_SYSINFO)	+= coreboot/
 obj-$(CONFIG_SEABIOS) += coreboot_table.o
 obj-y	+= early_cmos.o
 obj-y	+= e820.o
@@ -90,7 +90,7 @@
 
 ifdef CONFIG_EFI_STUB
 
-ifeq ($(CONFIG_$(SPL_)X86_64),)
+ifeq ($(CONFIG_$(XPL_)X86_64),)
 extra-y += $(EFI_CRT0) $(EFI_RELOC)
 endif