misc/pqrs: fix build on powerpc*

  --> /wrkdirs/usr/ports/misc/pqrs/work/pqrs-0.2.2/cargo-crates/parquet-12.0.0/src/util/hash_util.rs:26:37
   |
26 | fn hash_(data: &[u8], seed: u32) -> u32 {
   |    -----                            ^^^ expected `u32`, found `()`
   |    |
   |    implicitly returns `()` as its body has no tail or `return` expression
   |
help: consider returning the local binding `seed`