net: wireless: libertas: cmd.c: Cleaning up uninitialized variables

There is a risk that the variable will be used without being initialized.

This was largely found by using a static code analysis program called cppcheck.
Signed-off-by: NRickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/cmd.c

@@ -1111,6 +1111,7 @@ int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
 
 	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 	cmd.action = cpu_to_le16(CMD_ACT_SET);
+	cmd.control = 0;
 
 	/* Only v8 and below support setting the preamble */
 	if (priv->fwrelease < 0x09000000) {