lantiq: set maximum kernel size

These boards have a fixed size kernel partition but do not limit the
kernel size during image building.

Disable image building for both boards as well, since the kernel of the
last release as well as master are to big to fit into the 2 MByte kernel
partition.

Signed-off-by: Mathias Kresin <[email protected]>

target/linux/lantiq/image/ar9.mk

@@ -34,6 +34,7 @@ define Device/bt_homehub-v3a
   DEVICE_VARIANT := Type A
   BOARD_NAME := BTHOMEHUBV3A
   SOC := ar9
+  KERNEL_SIZE := 2048k
   DEVICE_PACKAGES := kmod-usb-dwc2 \
 	kmod-ltq-adsl-ar9-mei kmod-ltq-adsl-ar9 \
 	kmod-ltq-adsl-ar9-fw-a kmod-ltq-atm-ar9 \
@@ -42,6 +43,7 @@ define Device/bt_homehub-v3a
 	kmod-ath9k kmod-owl-loader wpad-basic-wolfssl \
 	uboot-envtools
   SUPPORTED_DEVICES += BTHOMEHUBV3A
+  DEFAULT := n
 endef
 TARGET_DEVICES += bt_homehub-v3a
 

target/linux/lantiq/image/danube.mk

@@ -188,6 +188,7 @@ define Device/bt_homehub-v2b
   DEVICE_VARIANT := Type B
   BOARD_NAME := BTHOMEHUBV2B
   SOC := danube
+  KERNEL_SIZE := 2048k
   DEVICE_PACKAGES := kmod-usb-dwc2 \
 	kmod-ltq-adsl-danube-mei kmod-ltq-adsl-danube \
 	kmod-ltq-adsl-danube-fw-a kmod-ltq-atm-danube \
@@ -195,6 +196,7 @@ define Device/bt_homehub-v2b
 	ltq-adsl-app ppp-mod-pppoa \
 	kmod-ath9k kmod-owl-loader wpad-basic-wolfssl
   SUPPORTED_DEVICES += BTHOMEHUBV2B
+  DEFAULT := n
 endef
 TARGET_DEVICES += bt_homehub-v2b