picassowifi: wifi: Switch to world regulatory domain

I think Samsung is modifying this at install time via csc which
we can't do.  Rather than default to GB, let's go with world
as our regulatory domain.

Change-Id: Id9c506c15e421f92191830c7817b72e3e3076815

picassowifi/proprietary/etc/wifi/nvram_net.txt

@@ -8,7 +8,7 @@ boardflags2=0x0
 boardflags3=0x810c089
 #boardnum=57410 
 macaddr=00:90:4c:c5:12:38
-ccode=GB
+ccode=00
 regrev=6
 antswitch=0
 pdgain5g=1