x86: qemu: split qfw command interface and qfw core

This patch splits qfw command interface and qfw core function into two
files, and introduces a new Kconfig option (CONFIG_QFW) for qfw core.

Now when qfw command interface is enabled, it will automatically select
qfw core. This patch also makes the ACPI table generation select
CONFIG_QFW.

Signed-off-by: Miao Yan <yanmiaobest@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/mp_init.c b/arch/x86/cpu/mp_init.c
index 13bec7a..c44a286 100644
--- a/arch/x86/cpu/mp_init.c
+++ b/arch/x86/cpu/mp_init.c
@@ -420,7 +420,7 @@
 	return 0;
 }
 
-#ifdef CONFIG_QEMU
+#ifdef CONFIG_QFW
 static int qemu_cpu_fixup(void)
 {
 	int ret;
@@ -496,7 +496,7 @@
 	if (ret)
 		return ret;
 
-#ifdef CONFIG_QEMU
+#ifdef CONFIG_QFW
 	ret = qemu_cpu_fixup();
 	if (ret)
 		return ret;
diff --git a/arch/x86/cpu/qemu/Makefile b/arch/x86/cpu/qemu/Makefile
index 43ee4bd..7c08c3d 100644
--- a/arch/x86/cpu/qemu/Makefile
+++ b/arch/x86/cpu/qemu/Makefile
@@ -7,5 +7,6 @@
 ifndef CONFIG_EFI_STUB
 obj-y += car.o dram.o
 endif
-obj-y += cpu.o qemu.o
+obj-y += qemu.o
+obj-$(CONFIG_QFW) += cpu.o
 obj-$(CONFIG_GENERATE_ACPI_TABLE) += acpi_table.o
diff --git a/arch/x86/cpu/qemu/qemu.c b/arch/x86/cpu/qemu/qemu.c
index b41e4ec..32a4351 100644
--- a/arch/x86/cpu/qemu/qemu.c
+++ b/arch/x86/cpu/qemu/qemu.c
@@ -88,7 +88,9 @@
 		enable_pm_ich9();
 	}
 
+#ifdef CONFIG_QFW
 	qemu_fwcfg_init();
+#endif
 }
 
 int arch_cpu_init(void)