Fix Kconfig coding style from spaces to tab

Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
	$ sed -e 's/^        /\t/' -i */Kconfig

Signed-off-by: Anand Moon <linux.amoon@gmail.com>
diff --git a/net/Kconfig b/net/Kconfig
index 5dff633..7cb80b8 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -42,8 +42,8 @@
 	  DNS server. To do this, they need the hostname of the DHCP
 	  requester.
 	  If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content
-          of the "hostname" environment variable is passed as
-          option 12 to the DHCP server.
+	  of the "hostname" environment variable is passed as
+	  option 12 to the DHCP server.
 
 config NET_RANDOM_ETHADDR
 	bool "Random ethaddr if unset"