meta-ampere: mtmitchell: enable NFS

Enable NFS distro to be able to mount NFS.

Tested:
1. Check below command (in BMC console)  works
  $ mount -t nfs 10.38.130.2:/tftpboot/ISO_file /tmp/mount_nfs

Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: I7991a268a5338da5a664403a6ba476e671481f42
diff --git a/meta-ampere/meta-mitchell/conf/machine/mtmitchell.conf b/meta-ampere/meta-mitchell/conf/machine/mtmitchell.conf
index 93e4a26..728c99a 100644
--- a/meta-ampere/meta-mitchell/conf/machine/mtmitchell.conf
+++ b/meta-ampere/meta-mitchell/conf/machine/mtmitchell.conf
@@ -10,6 +10,7 @@
 require conf/machine/include/ast2600.inc
 require conf/machine/include/obmc-bsp-common.inc
 require conf/distro/include/pldm.inc
+require conf/distro/include/nfs.inc
 
 FLASH_SIZE = "65536"