ARM: dts: imx6sl-warp: Add BCM4330 support

Warp has a Murata chip based on a BCM4330 that provides Wifi and Bluetooth
functionality.

Add support for it.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>