target/arm: Fix GPT fault type for address outside PPS

The GPT address size fault is for the table itself.  The physical
address being checked gets Granule protection fault at Level 0 (R_JFFHB).

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-id: 20250926001134.295547-9-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>