smb/client: replace nt_errs with ntstatus_to_dos_map

The ntstatus_to_dos_map[] array now contains the NT error strings,
making the nt_errs[] array redundant.

Introduce `struct ntstatus_to_dos_err` instead of an anonymous struct.
This allows cifs_print_status() to look up error strings directly
from a single table.

Remove nterr.c, as nt_errs[] was its only functional content.

Signed-off-by: Huiwen He <hehuiwen@kylinos.cn>
Reviewed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: haryven

fs/smb/client/Makefile

@@ -7,7 +7,7 @@ obj-$(CONFIG_CIFS) += cifs.o
 
 cifs-y := trace.o cifsfs.o cifs_debug.o connect.o dir.o file.o \
 	  inode.o link.o misc.o netmisc.o smbencrypt.o transport.o \
-	  cached_dir.o cifs_unicode.o nterr.o cifsencrypt.o \
+	  cached_dir.o cifs_unicode.o cifsencrypt.o \
 	  readdir.o ioctl.o sess.o export.o unc.o winucase.o \
 	  smb2ops.o smb2maperror.o smb2transport.o \
 	  smb2misc.o smb2pdu.o smb2inode.o smb2file.o cifsacl.o fs_context.o \