net: Make table id type u32

net: Make table id type u32

A number of VRF patches used 'int' for table id. It should be u32 to be
consistent with the rest of the stack.

Fixes:
4b44537faccf8 ("net: Introduce VRF related flags and helpers")
e1ae018e4c469 ("net: Add inet_addr lookup by table")
2413c8511683f ("net: Fix up inet_addr_type checks")
e37cac8315881 ("net: Add routes to the table associated with the device")
b1367369298ac ("inet: Move VRF table lookup to inlined function")
d480a1441907c ("net: FIB tracepoints")

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>