soc: bcm: raspberrypi-power: Fix use of __packed

Commit a09cd356586d ("ARM: bcm2835: add rpi power domain driver")
attempted to annotate the structure rpi_power_domain_packet with
__packed but introduced a typo and made it named __packet instead. Just
drop the annotation since the structure is naturally aligned already.

Fixes: a09cd356586d ("ARM: bcm2835: add rpi power domain driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

drivers/soc/bcm/raspberrypi-power.c

@@ -45,7 +45,7 @@ struct rpi_power_domains {
 struct rpi_power_domain_packet {
 	u32 domain;
 	u32 on;
-} __packet;
+};
 
 /*
  * Asks the firmware to enable or disable power on a specific power