ARM: imx_v6_v7_defconfig: Select BT_HCIUART_BCM

Select BT_HCIUART_BCM so that Bluetooth can work by default on a
imx7s-warp board with a BCM43455 Wifi/Bluetooth chip.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Author: fabioestevam

arch/arm/configs/imx_v6_v7_defconfig

@@ -68,6 +68,7 @@ CONFIG_BT=y
 CONFIG_BT_BNEP=m
 CONFIG_BT_HCIUART=y
 CONFIG_BT_HCIUART_LL=y
+CONFIG_BT_HCIUART_BCM=y
 CONFIG_BT_NXPUART=m
 CONFIG_CFG80211=y
 CONFIG_CFG80211_WEXT=y