powerpc: pseries: make suspend_subsys const

Because driver core can properly handle constant struct bus_type,
move the suspend_subsys to be a constant structure as well, placing it into
read-only memory which can not be modified at runtime.

Signed-off-by: Adrian Barnaś <[e-mail]>
Reviewed-by: Greg Kroah-Hartman <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

arch/powerpc/platforms/pseries/suspend.c

···
 
 static DEVICE_ATTR(hibernate, 0644, show_hibernate, store_hibernate);
 
-static struct bus_type suspend_subsys = {
+static const struct bus_type suspend_subsys = {
 	.name = "power",
 	.dev_name = "power",
 };