bcm53xx: use uncompressed zImages

The boot loader expects LZMA compressed kernel images

Signed-off-by: Felix Fietkau <[email protected]>

target/linux/bcm53xx/config-4.4

@@ -200,6 +200,8 @@ CONFIG_IRQ_DOMAIN=y
 CONFIG_IRQ_DOMAIN_HIERARCHY=y
 CONFIG_IRQ_FORCED_THREADING=y
 CONFIG_IRQ_WORK=y
+CONFIG_KERNEL_CAT=y
+# CONFIG_KERNEL_XZ is not set
 CONFIG_LIBFDT=y
 CONFIG_LOCK_SPIN_ON_OWNER=y
 CONFIG_LZO_COMPRESS=y