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:
8c8d03f0895e5 ("net: Introduce VRF related flags and helpers")
8bd3296daf6c7 ("net: Add inet_addr lookup by table")
10a3e2c94393b ("net: Fix up inet_addr_type checks")
3d4f81d3f6ea7 ("net: Add routes to the table associated with the device")
619c3fb45b21d ("inet: Move VRF table lookup to inlined function")
b8546725f0921 ("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>