OrangePi-RV2: Fix wireless access point mode by using the correct FW (#9504)

Notes: the bcmdhd.ko module loads firmware not on init, but delayed on
ifup wlan0. This is also true for AP mode, e.g. when starting hostapd.
Default FW file names are determined during runtime (with HW query).

We have different fw_bcm43456c5_ag.bin files under /lib/firmware,
where /lib/fw/ works but no AP mode and /lib/fw/brcm/ also works now
*with* AP mode. Additionally, there are different nvram_ap6256.txt
files, but at least with OrangePi RV2 AP6256 hardware, both work.

The fw_bcm43456c5_ag.bin and nvram_ap6256.txt files are the same as in
/lib/fw/rkwifi/, the rkwifi/ dir seems unused throughout Armbian cfgs.

Signed-off-by: Sven-Ola Tuecke <sven-ola@gmx.de>

Author: sven-ola

config/boards/orangepirv2.wip

@@ -36,6 +36,8 @@ function post_family_tweaks_bsp__orangepirv2_wifi() {
 	display_alert "$BOARD" "Force load bmcdhd wireless" "info"
 	run_host_command_logged mkdir -pv "${destination}"/etc/modules-load.d
 	run_host_command_logged echo "bcmdhd" > "${destination}"/etc/modules-load.d/${BOARD}.conf
+	run_host_command_logged mkdir -pv "${destination}"/etc/modprobe.d
+	run_host_command_logged echo "options bcmdhd firmware_path=brcm/ nvram_path=brcm/" > "${destination}"/etc/modprobe.d/${BOARD}.conf
 }
 
 function post_family_tweaks_bsp__orangepirv2_bluetooth() {