ARM: configs: disable DEBUG_LL in bcm_defconfig

DEBUG_LL is not supported yet on bcm281xx and causes a temporary
hang due to timeout at boot.

Signed-off-by: Matt Porter <matt.porter@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Christian Daudt <csd@broadcom.com>

arch/arm/configs/bcm_defconfig

@@ -124,7 +124,6 @@ CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=110
 CONFIG_BOOTPARAM_HUNG_TASK_PANIC=y
 CONFIG_DEBUG_INFO=y
 # CONFIG_FTRACE is not set
-CONFIG_DEBUG_LL=y
 CONFIG_CRC_CCITT=y
 CONFIG_CRC_T10DIF=y
 CONFIG_CRC_ITU_T=y