RIOT: fix memarray use

This change fixes the invocation of the MEMARRAY macro and
memarray_init() to conform with the proposed API in [1].

[1] https://github.com/RIOT-OS/RIOT/pull/7651/

Change-Id: Iaede8ac17dfef758e54cd4072d58212c64ca4b08

crypto.c

diff --git a/crypto.c b/crypto.c
index 7718b52..dcb7752 100644
--- a/crypto.c
+++ b/crypto.c
@@ -120,12 +120,12 @@
 #elif defined (RIOT_VERSION)
 
 #include "memarray.h"
-MEMARRAY(handshake_storage, sizeof(dtls_handshake_parameters_t), DTLS_HANDSHAKE_MAX)
-MEMARRAY(security_storage,  sizeof(dtls_security_parameters_t), DTLS_SECURITY_MAX)
+MEMARRAY(handshake_storage, dtls_handshake_parameters_t, DTLS_HANDSHAKE_MAX)
+MEMARRAY(security_storage,  dtls_security_parameters_t, DTLS_SECURITY_MAX)
 
 void crypto_init(void) {
-  memarray_init(&handshake_storage, sizeof(dtls_handshake_parameters_t), DTLS_HANDSHAKE_MAX);
-  memarray_init(&security_storage, sizeof(dtls_security_parameters_t), DTLS_SECURITY_MAX);
+  memarray_init(&handshake_storage);
+  memarray_init(&security_storage);
 }
 
 static dtls_handshake_parameters_t *dtls_handshake_malloc(void) {

dtls.c

diff --git a/dtls.c b/dtls.c
index 422ddba..f640a0c 100644
--- a/dtls.c
+++ b/dtls.c
@@ -63,7 +63,7 @@
 
 #ifdef RIOT_VERSION
 #include "memarray.h"
-MEMARRAY(dtlscontext_storage, sizeof(dtls_context_t), DTLS_CONTEXT_MAX)
+MEMARRAY(dtlscontext_storage, dtls_context_t, DTLS_CONTEXT_MAX)
 #endif /* RIOT_VERSION */
 
 #define dtls_set_version(H,V) dtls_int_to_uint16((H)->version, (V))
@@ -221,7 +221,7 @@
   peer_init();
 
 #ifdef RIOT_VERSION
-  memarray_init(&dtlscontext_storage, sizeof(dtls_context_t), DTLS_CONTEXT_MAX);
+  memarray_init(&dtlscontext_storage);
 #endif /* RIOT_VERSION */
 }
 

netq.c

diff --git a/netq.c b/netq.c
index ca7a1a4..22ffc10 100644
--- a/netq.c
+++ b/netq.c
@@ -64,7 +64,7 @@
 #elif defined (RIOT_VERSION)
 
 #include "memarray.h"
-MEMARRAY(netq_storage, sizeof(netq_t), NETQ_MAXCNT)
+MEMARRAY(netq_storage, netq_t, NETQ_MAXCNT)
 
 static inline netq_t *
 netq_malloc_node(size_t size) {
@@ -79,7 +79,7 @@
 
 void
 netq_init(void) {
-  memarray_init(&netq_storage, sizeof(netq_t), NETQ_MAXCNT);
+  memarray_init(&netq_storage);
 }
 
 #endif /* WITH_CONTIKI */

peer.c

diff --git a/peer.c b/peer.c
index d410d45..c9a1be4 100644
--- a/peer.c
+++ b/peer.c
@@ -62,11 +62,11 @@
 #elif defined (RIOT_VERSION)
 
 #include "memarray.h"
-MEMARRAY(peer_storage, sizeof(dtls_peer_t), DTLS_PEER_MAX)
+MEMARRAY(peer_storage, dtls_peer_t, DTLS_PEER_MAX)
 
 void
 peer_init(void) {
-  memarray_init(&peer_storage, sizeof(dtls_peer_t), DTLS_PEER_MAX);
+  memarray_init(&peer_storage);
 }
 
 static inline dtls_peer_t *