brcm47xx: build also TRX image for Linksys WRT300N V1

Linksys WRT300N V1 has pretty bugged CFE bootloader (it crashes in a lot
of situations) that doesn't accept .bin image.

Signed-off-by: Rafał Miłecki <[email protected]>

target/linux/brcm47xx/image/Makefile

@@ -391,6 +391,7 @@ TARGET_DEVICES += linksys-wrt160n-v1
 
 define Device/linksys-wrt300n-v1
   $(Device/linksys)
+  IMAGES := bin trx
   DEVICE_ID := EWCB
   VERSION := 1.03.6
 endef