switch_lan_bmp and switch_wan_bmp have wrong values and now cause
problems with the new version of the qca-ssdk.
Fix the wrong entry and drop the redundant switch_cpu_bmp.
Also introduce some convenient define to better understand values in
this map.
Fixes: eea264fead ("kernel: qca-ssdk: update to 12.4")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Tested-by: Robert Marko <robimarko@gmail.com> # Dynalink AX3600 and Qnap 301W
Reviewed by: Robert Marko <robimarko@gmail.com>