docs: Fix more broken references

As we move stuff around, some doc references are broken. Fix some of
them via this script:
	./scripts/documentation-file-ref-check --fix

Manually checked that produced results are valid.

Acked-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>

Documentation/devicetree/bindings/net/dsa/ksz.txt

@@ -6,7 +6,7 @@ Required properties:
 - compatible: For external switch chips, compatible string must be exactly one
   of: "microchip,ksz9477"
 
-See Documentation/devicetree/bindings/dsa/dsa.txt for a list of additional
+See Documentation/devicetree/bindings/net/dsa/dsa.txt for a list of additional
 required and optional properties.
 
 Examples:

Documentation/devicetree/bindings/net/dsa/mt7530.txt

@@ -31,7 +31,7 @@ Required properties for the child nodes within ports container:
 - phy-mode: String, must be either "trgmii" or "rgmii" for port labeled
 	 "cpu".
 
-See Documentation/devicetree/bindings/dsa/dsa.txt for a list of additional
+See Documentation/devicetree/bindings/net/dsa/dsa.txt for a list of additional
 required, optional properties and how the integrated switch subnodes must
 be specified.