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;