tests/qtest/bios-tables-test: Allow changes to virt GTDT

Allow changes to the virt GTDT -- we are going to add the IRQ
entry for a new timer to it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Message-id: 20240122143537.233498-2-peter.maydell@linaro.org
1 file changed