drivers: net: hamradio: fix document location

The hamradio docs were moved to a different dir.
Update its location accordingly.

Fixes: 14474950 ("docs: networking: move z8530 to the hw driver section")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/net/hamradio/scc.c

@@ -7,7 +7,7 @@
  *            ------------------
  *
  * You can find a subset of the documentation in 
- * Documentation/networking/device_drivers/wan/z8530drv.rst.
+ * Documentation/networking/device_drivers/hamradio/z8530drv.rst.
  */
 
 /*