simplelink: net: tweaks to SlNetSock to prevent build errors/warnings

Minor tweaks to the SlNetSock code to avoid errors/warnings
when building for Zephyr, due to its stricter build flags and its
idiosyncrasies around its posix implementations.

Signed-off-by: Vincent Wan <vwan@ti.com>

simplelink/source/ti/drivers/net/wifi/slnetif/slnetifwifi.c

@@ -436,7 +436,7 @@ int32_t matchModeByRole(SlNetIfAddressType_e addrType,
 {
     SlWlanConnStatusParam_t WlanConnectInfo;
     uint16_t Len;
-    int32_t retVal;
+    int32_t retVal = SLNETERR_RET_CODE_OK; /* prevent build warning */
 
     switch(addrType)
     {

simplelink/source/ti/net/slnetsock.c

@@ -46,7 +46,8 @@
 #include <ti/net/slneterr.h>
 
 /* POSIX Header files */
-#include <semaphore.h>
+/* Changed include path to match Zephyr posix */
+#include <posix/semaphore.h>
 
 /*****************************************************************************/
 /* Macro declarations                                                        */

simplelink/source/ti/net/slnetsock.h

@@ -191,7 +191,14 @@ interface.  Some are mandatory, others are optional (but recommended).
 #define __SL_NET_SOCK_H__
 
 #include <stdint.h>
+/*
+ * Commented out to prevent zsock_timeval from being redefined
+ * Can remove this if support for CONFIG_NET_SOCKETS_POSIX_NAMES
+ * is dropped someday
+ */
+#ifndef CONFIG_NET_SOCKETS_POSIX_NAMES
 #include <sys/time.h>
+#endif
 
 #ifdef    __cplusplus
 extern "C" {