hw/intc/arm_gicv3_redist: Use set_pending_table_bit() in mov handling

hw/intc/arm_gicv3_redist: Use set_pending_table_bit() in mov handling

We can use our new set_pending_table_bit() utility function
in gicv3_redist_mov_lpi() to clear the bit in the source
pending table, rather than doing the "load, clear bit, store"
ourselves.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-34-peter.maydell@linaro.org