Change to zstd compressed instead of gz-compressed tarballs. zstd
compresses 7-8 times faster and decompresses 2-3 times faster.
This change also make sharing tarballs between different branches
possible, because OpenWrt 25.12 uses zstd as default.
Signed-off-by: Andreas Gnau <andreas.gnau@iopsys.eu>
The inclusion of bcm-kernel-toolchain.mk cannot be conditional since
CONFIG_TARGET_brcmbca is not defined when package metadata is being
generated. Instead make it optional in case broadcom feed is absent.
* fix dependencies for the ebtables-extensions and qosmngr packages
* ebtables-extensions should not have dependency on ebtables-legacy
* qosmngr should have dependency on ebtables-legacy for non-brcm targets
* for brcm targets, ebtables from brcm sdk is used