target/arm: Handle FEAT_NV2 changes to when SPSR_EL1.M reports EL2

With FEAT_NV2, the condition for when SPSR_EL1.M should report that
an exception was taken from EL2 changes.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Miguel Luis <miguel.luis@oracle.com>
1 file changed