x86: qemu: Move qfw command over to cmd and add Kconfig entry

- Move the command portion of arch/x86/cpu/qemu/fw_cfg.c into
  cmd/qemu_fw_cfg.c
- Move arch/x86/include/asm/fw_cfg.h to include/qemu_fw_cfg.h
- Rename ACPI table portion to arch/x86/cpu/qemu/acpi_table.c

Signed-off-by: Tom Rini <trini@konsulko.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 2604a68..13bec7a 100644
--- a/arch/x86/cpu/mp_init.c
+++ b/arch/x86/cpu/mp_init.c
@@ -11,6 +11,7 @@
 #include <dm.h>
 #include <errno.h>
 #include <malloc.h>
+#include <qemu_fw_cfg.h>
 #include <asm/atomic.h>
 #include <asm/cpu.h>
 #include <asm/interrupt.h>
@@ -21,7 +22,6 @@
 #include <asm/mtrr.h>
 #include <asm/processor.h>
 #include <asm/sipi.h>
-#include <asm/fw_cfg.h>
 #include <dm/device-internal.h>
 #include <dm/uclass-internal.h>
 #include <dm/lists.h>