Experimental Bluetooth coexistence parameters from Cypress

raspberrypi/linux#1402 (comment)

Author: paul-1

firmware-rpi3-wireless/lib/firmware/brcm/brcmfmac43430-sdio.txt

@@ -57,3 +57,8 @@ muxenab=0x1
 
 #VCO freq 326.4MHz
 spurconfig=0x3 
+
+# Experimental Bluetooth coexistence parameters from Cypress
+btc_mode=1
+btc_params8=0x4e20
+btc_params1=0x7530

firmware-rpi3-wireless/lib/firmware/brcm/brcmfmac43455-sdio.txt

@@ -90,3 +90,8 @@ txpwr5gAdcScale=1
 dot11b_opts=0x3aa85
 cbfilttype=1
 fdsslevel_ch11=6
+
+# Experimental Bluetooth coexistence parameters from Cypress
+btc_mode=1
+btc_params8=0x4e20
+btc_params1=0x7530