target/rx: Expand TCG register definitions for 32-bit target

target/rx: Expand TCG register definitions for 32-bit target

The RX target is only built as 32-bit:

  $ git grep TARGET_LONG_BITS configs/targets/rx-*
  configs/targets/rx-softmmu.mak:5:TARGET_LONG_BITS=32

Therefore target_ulong always expands to uint32_t.

Replace and adapt the API uses mechanically:

  TCGv -> TCGv_i32
  tcg_temp_new -> tcg_temp_new_i32

There is no functional change.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20251009151607.26278-9-philmd@linaro.org>