wifi: brcmfmac: Make read-only array cfg_offset static const

Don't populate the read-only array cfg_offset on the stack at run time,
instead make it static const.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Link: https://patch.msgid.link/20250619082554.1834654-1-colin.i.king@gmail.com


Signed-off-by: Johannes Berg <johannes.berg@intel.com>