brcm63xx: drop b43 from devices with unsupported wifi

The internal wifi isn't supported, so drop b43 from devices that only
have it.

Fixes FS#1698
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

target/linux/brcm63xx/image/bcm63xx.mk

@@ -1016,7 +1016,7 @@ define Device/NEUFBOX6
   CFE_CHIP_ID := 6362
   CFE_EXTRAS += --rsa-signature "$(VERSION_DIST)-$(firstword $(subst -,$(space),$(REVISION)))"
   DEVICE_PACKAGES := \
-    $(B43_PACKAGES) $(USB2_PACKAGES)
+    $(USB2_PACKAGES)
 endef
 TARGET_DEVICES += NEUFBOX6
 
@@ -1028,7 +1028,7 @@ define Device/SR102
   CFE_CHIP_ID := 63268
   CFE_EXTRAS += --rsa-signature "$(VERSION_DIST)-$(firstword $(subst -,$(space),$(REVISION)))"
   DEVICE_PACKAGES := \
-    $(B43_PACKAGES) $(USB2_PACKAGES)
+    $(USB2_PACKAGES)
 endef
 TARGET_DEVICES += SR102