This patch fixes 'maybe-uninitialized' warnings reported by compiler
when using LTO.
Compiler warning pointing to this error (with LTO enabled):
error: ‘kg_cfg.extracts[0].masks[0].mask’ may be used uninitialized in
this function [-Werror=maybe-uninitialized]
extr->masks[j].mask = cfg->extracts[i].masks[j].mask;
Fixes: 16bbc98a3e ("bus/fslmc: update MC to 10.3.x")
Cc: stable@dpdk.org
Signed-off-by: Andrzej Ostruszka <aostruszka@marvell.com>