target/openrisc: Remove target_ulong use in raise_mmu_exception()

target/openrisc: Remove target_ulong use in raise_mmu_exception()

TCGCPUOps::tlb_fill() handler provides a vaddr type (since commit
7510454e3e7 "cpu: Turn cpu_handle_mmu_fault() into a CPUClass hook").

Do not inline get_phys_nommu(), rely on the linker to optimize at
linking time.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20251010070702.51484-5-philmd@linaro.org>