clocksource/drivers/arm_global_timer: Remove duplicated argument in arm_global_timer

Fix the following coccicheck warning:

    drivers/clocksource/arm_global_timer.c:107:4-23:
    duplicated argument to & or |

Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210615115440.8881-1-wanjiabing@vivo.com