distributor: fix potential overflow

distributor: fix potential overflow

Coverity flags the fact that the tag values used in distributor are
32-bit, which means that when we use bit-manipulation to convert a tag
match/no-match to a bit in an array, we need to typecast to a 64-bit
type before shifting past 32 bits.

Coverity issue: 375808
Fixes: 08ccf3faa6a9 ("distributor: new packet distributor library")
Cc: stable@dpdk.org
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: David Hunt <david.hunt@intel.com>