layerscape: armv7: drop skipped packages

Now that all packages that relied on the skip mechanism are selected
via BUILD_DEVICES or by defaulting for the subtarget drop them from
individual DEVICE_PACKAGES so that Image Builder works again for armv7.

Fixes: #18411
Link: https://github.com/openwrt/openwrt/pull/18462
Signed-off-by: Robert Marko <[email protected]>

target/linux/layerscape/image/armv7.mk

@@ -31,7 +31,6 @@ define Device/fsl_ls1021a-twr
   DEVICE_VENDOR := NXP
   DEVICE_MODEL := TWR-LS1021A
   DEVICE_VARIANT := Default
-  DEVICE_PACKAGES += ~layerscape-rcw
   IMAGE/firmware.bin := \
     ls-clean | \
     ls-append $(1)-rcw.bin | pad-to 1M | \