ti_armv7_common: env: Add NFS loading support to default enviroment

NFS loading is similar to net loading except initial files are loaded
over NFS instead of TFTP, this removes the need for multiple different
protocol servers running on the host and allows the use of a single
network file system containing boot related files in their usual
in-filesystem directory. Add defaults for this boot style here.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

include/configs/ti_armv7_keystone2.h

@@ -259,15 +259,20 @@
 	"run_mon=mon_install ${addr_mon}\0"				\
 	"run_kern=bootz ${loadaddr} ${rd_spec} ${fdtaddr}\0"		\
 	"init_net=run args_all args_net\0"				\
+	"init_nfs=setenv autoload no; dhcp; run args_all args_net\0"	\
 	"init_ubi=run args_all args_ubi; "				\
 		"ubi part ubifs; ubifsmount ubi:rootfs;\0"			\
 	"get_fdt_net=dhcp ${fdtaddr} ${tftp_root}/${name_fdt}\0"	\
+	"get_fdt_nfs=nfs ${fdtaddr} ${nfs_root}/boot/${name_fdt}\0"	\
 	"get_fdt_ubi=ubifsload ${fdtaddr} ${bootdir}/${name_fdt}\0"		\
 	"get_kern_net=dhcp ${loadaddr} ${tftp_root}/${name_kern}\0"	\
+	"get_kern_nfs=nfs ${loadaddr} ${nfs_root}/boot/${name_kern}\0"	\
 	"get_kern_ubi=ubifsload ${loadaddr} ${bootdir}/${name_kern}\0"		\
 	"get_mon_net=dhcp ${addr_mon} ${tftp_root}/${name_mon}\0"	\
+	"get_mon_nfs=nfs ${addr_mon} ${nfs_root}/boot/${name_mon}\0"	\
 	"get_mon_ubi=ubifsload ${addr_mon} ${bootdir}/${name_mon}\0"		\
 	"get_uboot_net=dhcp ${loadaddr} ${tftp_root}/${name_uboot}\0"	\
+	"get_uboot_nfs=nfs ${loadaddr} ${nfs_root}/boot/${name_uboot}\0" \
 	"burn_uboot_spi=sf probe; sf erase 0 0x80000; "		\
 		"sf write ${loadaddr} 0 ${filesize}\0"		\
 	"burn_uboot_nand=nand erase 0 0x100000; "			\
@@ -282,6 +287,7 @@
 	"get_mon_ramfs=dhcp ${addr_mon} ${tftp_root}/${name_mon}\0"	\
 	"get_fs_ramfs=dhcp ${rdaddr} ${tftp_root}/${name_fs}\0"	\
 	"get_ubi_net=dhcp ${addr_ubi} ${tftp_root}/${name_ubi}\0"	\
+	"get_ubi_nfs=nfs ${addr_ubi} ${nfs_root}/boot/${name_ubi}\0"	\
 	"burn_ubi=nand erase.part ubifs; "				\
 		"nand write ${addr_ubi} ubifs ${filesize}\0"		\
 	"init_ramfs=run args_all args_ramfs get_fs_ramfs\0"		\