cc2538: pka: Fix include paths breakage

The PKA drivers and examples were full of include paths missing the
appropriate prefix, or using angle brackets instead of double quotes or
the other way around.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>

cpu/cc2538/dev/ecc-algorithm.c

@@ -35,15 +35,15 @@
  * \file
  * Implementation of the cc2538 ECC Algorithms
  */
-#include <contiki.h>
-#include <process.h>
+#include "contiki.h"
+#include "sys/process.h"
 
 #include <limits.h>
 #include <stdio.h>
 
-#include "ecc-algorithm.h"
-#include "ecc-driver.h"
-#include "pka.h"
+#include "dev/ecc-algorithm.h"
+#include "dev/ecc-driver.h"
+#include "dev/pka.h"
 
 #define CHECK_RESULT(...)                                                  \
   state->result = __VA_ARGS__;                                             \