arch: nds32: Kconfig: pedantic formatting

Formatting of Kconfig files doesn't look so pretty, so let the
Great White Handkerchief come around and clean it up.
Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>

arch/nds32/Kconfig

@@ -4,7 +4,7 @@
 #
 
 config NDS32
-        def_bool y
+	def_bool y
 	select ARCH_32BIT_OFF_T
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
@@ -51,13 +51,13 @@ config GENERIC_CALIBRATE_DELAY
 	def_bool y
 
 config GENERIC_CSUM
-        def_bool y
+	def_bool y
 
 config GENERIC_HWEIGHT
-        def_bool y
+	def_bool y
 
 config GENERIC_LOCKBREAK
-        def_bool y
+	def_bool y
 	depends on PREEMPT
 
 config RWSEM_GENERIC_SPINLOCK
@@ -67,7 +67,7 @@ config TRACE_IRQFLAGS_SUPPORT
 	def_bool y
 
 config STACKTRACE_SUPPORT
-        def_bool y
+	def_bool y
 
 config FIX_EARLYCON_MEM
 	def_bool y
@@ -82,11 +82,11 @@ config NR_CPUS
 	default 1
 
 config MMU
-        def_bool y
+	def_bool y
 
 config NDS32_BUILTIN_DTB
-        string "Builtin DTB"
-        default ""
+	string "Builtin DTB"
+	default ""
 	help
 	  User can use it to specify the dts of the SoC
 endmenu