ps3_read_pm (pm_interval) should return an actual HW register value
because the pm_interval register is a counter register.
This removes the shadow pm_interval register.
Signed-off-by: NTakashi Yamamoto <TakashiA.Yamamoto@jp.sony.com>
Signed-off-by: NGeoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>