fib: fix mpls db label overflow
mpls fib DB size was 2^20 instead of intended 2^21.
Therefore large mpls labels caused DB to overflow and write
to other tables or some random objects. Or crash with ASAN.
Sometimes.
Type: fix
* Type exposure is to allow the DP fast/inlined access
*/
#define MPLS_FIB_KEY_SIZE 21
-#define MPLS_FIB_DB_SIZE (1 << (MPLS_FIB_KEY_SIZE-1))
+#define MPLS_FIB_DB_SIZE (1 << MPLS_FIB_KEY_SIZE)
/**
* There are no options for controlling the MPLS flow hash,
