cifs: Simplify SMB2 and SMB311 dependencies

BugLink: http://bugs.launchpad.net/bugs/1670508

* CIFS_SMB2 depends on CIFS, which depends on INET and selects NLS. So
  these dependencies do not need to be repeated for CIFS_SMB2.
* CIFS_SMB311 depends on CIFS_SMB2, which depends on INET. So this
  dependency doesn't need to be repeated for CIFS_SMB311.
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Steve French <sfrench@samba.org>
(cherry picked from commit c1ecea87)
Signed-off-by: Joseph Salisbury <joseph.salisbury@canonical.com>

fs/cifs/Kconfig

@@ -169,8 +169,7 @@ config CIFS_NFSD_EXPORT
 
 config CIFS_SMB2
 	bool "SMB2 and SMB3 network file system support"
-	depends on CIFS && INET
-	select NLS
+	depends on CIFS
 	select KEYS
 	select FSCACHE
 	select DNS_RESOLVER
@@ -194,7 +193,7 @@ config CIFS_SMB2
 
 config CIFS_SMB311
 	bool "SMB3.1.1 network file system support (Experimental)"
-	depends on CIFS_SMB2 && INET
+	depends on CIFS_SMB2
 
 	help
 	  This enables experimental support for the newest, SMB3.1.1, dialect.