scmi_power_domain: Fix device set state
Created by: tarek-arm
This patch fixes a bug in the device set state. For devices, the set_state api should be used and not the set_state_async.
Change-Id: Iff76d68b4a506146d4d24ca215b4b8dd47678743 Signed-off-by: Tarek El-Sherbiny tarek.el-sherbiny@arm.com