target/microblaze: Convert CPUMBState::res_addr field to uint32_t type

target/microblaze: Convert CPUMBState::res_addr field to uint32_t type

CPUMBState::@res_addr field is used as u32 since commit
cfeea807e5a ("target-microblaze: Tighten up TCGv_i32 vs
TCGv type usage"). Convert it as such, bumping the migration
version. Use the RES_ADDR_NONE definition when appropriate.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20251015180115.97493-8-philmd@linaro.org>