added editorconfig and formated code

arch/Config.in

@@ -1,3 +1,5 @@
-source "arch/arm/Config.in"
-source "arch/aarch64/Config.in"
-source "arch/x86_64/Config.in"
+menu "Architecture"
+	source "arch/arm/Config.in"
+	source "arch/aarch64/Config.in"
+	source "arch/x86_64/Config.in"
+endmenu

arch/aarch64/Config.in

@@ -1,2 +1,2 @@
 config SIMPLE_AARCH64
-    bool "aarch64"
+	bool "aarch64"

arch/arm/Config.in

@@ -1,2 +1,2 @@
 config SIMPLE_ARM
-    bool "arm"
+	bool "arm"

arch/x86_64/Config.in

@@ -1,2 +1,2 @@
 config SIMPLE_X86_64
-    bool "x86_64"
+	bool "x86_64"