libertas: convert CMD_FWT_ACCESS to a direct command

Slightly different approach here since there are so many arguments to
the firmware command.  Just let the caller fill them in before pushing
the command to the firmware.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/host.h b/drivers/net/wireless/libertas/host.h
index e817177..03d2ae9 100644
--- a/drivers/net/wireless/libertas/host.h
+++ b/drivers/net/wireless/libertas/host.h
@@ -912,6 +912,8 @@
 } __packed;
 
 struct cmd_ds_fwt_access {
+	struct cmd_header hdr;
+
 	__le16 action;
 	__le32 id;
 	u8 valid;
@@ -961,7 +963,6 @@
 	/* command Body */
 	union {
 		struct cmd_ds_802_11_ps_mode psmode;
-		struct cmd_ds_fwt_access fwt;
 	} params;
 } __packed;
 #endif