[rdkb][common][config][Fix MBSS issue in hostapd-init.sh]

[Description]
The files /tmp/phyX-wifiX are created for each Wi-Fi interface, which causes the function radio_index_to_phy() to parse the wrong phy index.
Solution: Create only one file /tmp/phyX-wifiX per radio instead of one file per Wi-Fi interface.

[Release-log]
N/A

Change-Id: I383f4f54fb72102f4e97fe8870207314584cdfdf
1 file changed