Staging: rtl8192e: Fix Sparse Warning for Static Declarations in rtllib_softmac.c

This patch fixes the following Sparse warnings in rtllib_softmac.c-

drivers/staging/rtl8192e/rtllib_softmac.c:3636:12: warning: symbol 'rtllib_MgntDisconnectIBSS' was not declared. Should it be static?
drivers/staging/rtl8192e/rtllib_softmac.c:3661:13: warning: symbol 'rtllib_MlmeDisassociateRequest' was not declared. Should it be static?
drivers/staging/rtl8192e/rtllib_softmac.c:3687:13: warning: symbol 'rtllib_MgntDisconnectAP' was not declared. Should it be static?

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Reviewed-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtllib_softmac.c

@@ -3633,7 +3633,7 @@ out:
 }
 EXPORT_SYMBOL(rtllib_wpa_supplicant_ioctl);
 
-void rtllib_MgntDisconnectIBSS(struct rtllib_device *rtllib)
+static void rtllib_MgntDisconnectIBSS(struct rtllib_device *rtllib)
 {
 	u8	OpMode;
 	u8	i;
@@ -3658,7 +3658,7 @@ void rtllib_MgntDisconnectIBSS(struct rtllib_device *rtllib)
 
 }
 
-void rtllib_MlmeDisassociateRequest(struct rtllib_device *rtllib, u8 *asSta,
+static void rtllib_MlmeDisassociateRequest(struct rtllib_device *rtllib, u8 *asSta,
 				    u8 asRsn)
 {
 	u8 i;
@@ -3684,7 +3684,7 @@ void rtllib_MlmeDisassociateRequest(struct rtllib_device *rtllib, u8 *asSta,
 
 }
 
-void
+static void
 rtllib_MgntDisconnectAP(
 	struct rtllib_device *rtllib,
 	u8 asRsn