pmdomain: raspberrypi-power: set flag GENPD_FLAG_ACTIVE_WAKEUP

Set flag GENPD_FLAG_ACTIVE_WAKEUP to rpi_power genpd, then when a device
is set as wakeup source using device_set_wakeup_enable, the power
domain could be kept on to make sure the device could wakeup the system.

Signed-off-by: Stefan Wahren <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/pmdomain/bcm/raspberrypi-power.c

···
 	dom->fw = rpi_domains->fw;
 
 	dom->base.name = name;
+	dom->base.flags = GENPD_FLAG_ACTIVE_WAKEUP;
 	dom->base.power_on = rpi_domain_on;
 	dom->base.power_off = rpi_domain_off;