dsp: audio_prm: check if gpr is ready

During SSR, GPR will receive adsp down notification
first and set to SUBSYS_DOWN mode. Sometimes before
audio_prm received adsp down notification, prm_gpr_send_pkt
is called but it will get stucked in spf_core_is_apm_ready
for 30s and device crash happens. In audio_prm, before
checking if spf is ready, check if both prm and gpr are ready
to avoid getting stucked.

Change-Id: I851c140a07162e4fcf20353002ef0130441ca1db
Signed-off-by: Meng Wang <mengw@codeaurora.org>

include/ipc/gpr-lite.h

@@ -284,4 +284,5 @@ void gpr_driver_unregister(struct gpr_driver *drv);
 int gpr_send_pkt(struct gpr_device *adev, struct gpr_pkt *pkt);
 
 enum gpr_subsys_state gpr_get_modem_state(void);
+enum gpr_subsys_state gpr_get_q6_state(void);
 #endif /* __QCOM_GPR_H_ */