libertas: convert PS_MODE to a direct command

Powersave looks like it got broken at some point but we'll fix that up
when the command submission stuff is more understandable, which this
series helps to do.  That said, this patch should not further break
powersave.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/cmd.h b/drivers/net/wireless/libertas/cmd.h
index bfb3690..19b1f21 100644
--- a/drivers/net/wireless/libertas/cmd.h
+++ b/drivers/net/wireless/libertas/cmd.h
@@ -94,10 +94,6 @@
 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
 				struct sleep_params *sp);
 
-void lbs_ps_sleep(struct lbs_private *priv, int wait_option);
-
-void lbs_ps_wakeup(struct lbs_private *priv, int wait_option);
-
 void lbs_ps_confirm_sleep(struct lbs_private *priv);
 
 int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on);
@@ -143,4 +139,6 @@
 
 int lbs_set_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 value);
 
+int lbs_set_ps_mode(struct lbs_private *priv, u16 cmd_action, bool block);
+
 #endif /* _LBS_CMD_H */