target/sdk: remove obsolete make calls for the ancient package directory format

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39911 3c298f89-4303-0410-b956-a3cf2f4a3e73
target/sdk: fix parallel build calls

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39912 3c298f89-4303-0410-b956-a3cf2f4a3e73
target/sdk: use .config instead of unconditionally enabling all build dirs

Call make defconfig on every build to catch newly added packages

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39913 3c298f89-4303-0410-b956-a3cf2f4a3e73