docs: networking: convert bonding.txt to ReST

- add SPDX header;
- adjust titles and chapters, adding proper markups;
- comment out text-only TOC from html/pdf output;
- mark code blocks and literals as such;
- mark tables as such;
- add notes markups;
- adjust identation, whitespaces and blank lines;
- add to networking/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/device_drivers/intel/e100.rst

@@ -33,7 +33,7 @@ The following features are now available in supported kernels:
  - SNMP
 
 Channel Bonding documentation can be found in the Linux kernel source:
-/Documentation/networking/bonding.txt
+/Documentation/networking/bonding.rst
 
 
 Identifying Your Adapter

Documentation/networking/device_drivers/intel/ixgb.rst

@@ -37,7 +37,7 @@ The following features are available in this kernel:
  - SNMP
 
 Channel Bonding documentation can be found in the Linux kernel source:
-/Documentation/networking/bonding.txt
+/Documentation/networking/bonding.rst
 
 The driver information previously displayed in the /proc filesystem is not
 supported in this release.  Alternatively, you can use ethtool (version 1.6

Documentation/networking/index.rst

@@ -44,6 +44,7 @@ Contents:
    atm
    ax25
    baycom
+   bonding
 
 .. only::  subproject and html
 

drivers/net/Kconfig

@@ -50,7 +50,7 @@ config BONDING
 	  The driver supports multiple bonding modes to allow for both high
 	  performance and high availability operation.
 
-	  Refer to <file:Documentation/networking/bonding.txt> for more
+	  Refer to <file:Documentation/networking/bonding.rst> for more
 	  information.
 
 	  To compile this driver as a module, choose M here: the module