x86: move i386 and x86_64 Kconfig files to x86 directory

After a small change in kconfig Makefile we could
move all x86 Kconfig files to x86 directory.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/arch/i386/Kconfig.cpu b/arch/x86/Kconfig.cpu
similarity index 100%
rename from arch/i386/Kconfig.cpu
rename to arch/x86/Kconfig.cpu
diff --git a/arch/i386/Kconfig b/arch/x86/Kconfig.i386
similarity index 99%
rename from arch/i386/Kconfig
rename to arch/x86/Kconfig.i386
index d24e3e2..7331efe 100644
--- a/arch/i386/Kconfig
+++ b/arch/x86/Kconfig.i386
@@ -287,7 +287,7 @@
 	default y
 	depends on SMP && X86_ES7000 && MPENTIUMIII
 
-source "arch/i386/Kconfig.cpu"
+source "arch/x86/Kconfig.cpu"
 
 config HPET_TIMER
 	bool "HPET Timer Support"
diff --git a/arch/x86_64/Kconfig b/arch/x86/Kconfig.x86_64
similarity index 100%
rename from arch/x86_64/Kconfig
rename to arch/x86/Kconfig.x86_64
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 3c9db07..5959412 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -4,7 +4,12 @@
 
 PHONY += oldconfig xconfig gconfig menuconfig config silentoldconfig update-po-config
 
-Kconfig := arch/$(ARCH)/Kconfig
+# If a arch/$(SRCARCH)/Kconfig.$(ARCH) file exist use it
+ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/Kconfig.$(ARCH)),)
+        Kconfig := arch/$(SRCARCH)/Kconfig.$(ARCH)
+else
+        Kconfig := arch/$(SRCARCH)/Kconfig
+endif
 
 xconfig: $(obj)/qconf
 	$< $(Kconfig)