sockets: Trivial comment fixes

lwip_getsockopt_internal/lwip_setsockopt_internal were renamed to
lwip_getsockopt_impl/lwip_setsockopt_impl. Update the comment accordingly.

Signed-off-by: Axel Lin <axel.lin@ingics.com>

src/api/sockets.c

@@ -2822,7 +2822,7 @@ lwip_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen)
          LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optlen);
 #endif /* LWIP_MPU_COMPATIBLE */
 
-  /* maybe lwip_getsockopt_internal has changed err */
+  /* maybe lwip_getsockopt_impl has changed err */
   err = LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).err;
   LWIP_SETGETSOCKOPT_DATA_VAR_FREE(data);
 #endif /* LWIP_TCPIP_CORE_LOCKING */
@@ -3263,7 +3263,7 @@ lwip_setsockopt(int s, int level, int optname, const void *optval, socklen_t opt
   }
   sys_arch_sem_wait((sys_sem_t *)(LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem), 0);
 
-  /* maybe lwip_getsockopt_internal has changed err */
+  /* maybe lwip_setsockopt_impl has changed err */
   err = LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).err;
   LWIP_SETGETSOCKOPT_DATA_VAR_FREE(data);
 #endif  /* LWIP_TCPIP_CORE_LOCKING */

src/include/lwip/priv/sockets_priv.h

@@ -99,7 +99,7 @@ struct lwip_sock {
 /** Maximum optlen used by setsockopt/getsockopt */
 #define LWIP_SETGETSOCKOPT_MAXOPTLEN LWIP_MAX(16, sizeof(struct ifreq))
 
-/** This struct is used to pass data to the set/getsockopt_internal
+/** This struct is used to pass data to the set/getsockopt_impl
  * functions running in tcpip_thread context (only a void* is allowed) */
 struct lwip_setgetsockopt_data {
   /** socket index for which to change options */