mlx5: fix psample_sample_packet link error

When PSAMPLE is a loadable module, built-in drivers cannot use it:

aarch64-linux-ld: drivers/net/ethernet/mellanox/mlx5/core/en/tc/sample.o: in function `mlx5e_tc_sample_skb':
sample.c:(.text+0xd68): undefined reference to `psample_sample_packet'

Add the same dependency here that is used for MLXSW

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>