Drop RPi RF modules for now

No Raspberry Pi 5 specific device tree overlays are  available, drop RPi
RF mod for now.

Author: agners

buildroot-external/configs/rpi5_64_defconfig

@@ -138,8 +138,6 @@ BR2_PACKAGE_HASSIO_MACHINE="raspberrypi4-64"
 BR2_PACKAGE_OS_AGENT=y
 BR2_PACKAGE_OS_AGENT_BOARD="RaspberryPi4"
 BR2_PACKAGE_PI_BLUETOOTH=y
-BR2_PACKAGE_RPI_RF_MOD=y
-BR2_PACKAGE_RPI_RF_MOD_DTS=y
 BR2_PACKAGE_RTL88X2BU=y
 BR2_PACKAGE_HOST_TEMPIO=y
 BR2_PACKAGE_UDISKS2=y