tests/drivers/candev: minor change

tests/drivers/candev/main.c

@@ -171,7 +171,7 @@ static int _set_can_filter(int argc, char **argv)
     struct can_filter filter = {
         .can_mask = 0x7FF,
         .can_id = 0x1aa,
-#if !defined(__linux__)
+#if (MODULE_CAN_RX_MAILBOX)
         .target_mailbox = 1,
 #endif
     };
@@ -308,34 +308,35 @@ if (IS_ACTIVE(CONFIG_USE_LOOPBACK_MODE)) {
 }
 
 /* Depending from the CAN controller used, this test example will provide different results.
-For MCP2515 standalone CAN controller, the last filter won't be applied as the first reception mailbox supports up to two filters
-For SAMD5x/E5x CAN controller, and with keeping the default parameters in candev_samd5x.h, the last filter won't be applied
-    as the CAN controller supports up to 3 standard filters
-For SAMD5x/E5x CAN controller, if you increase the maximum capacity of the standard filters (as mentioned in Makefile.board.dep),
-    the last filter can be applied correctly. */
+- For MCP2515 standalone CAN controller, the last filter won't be applied
+as the first reception mailbox supports up to two filters
+- For SAMD5x/E5x CAN controller, and with keeping the default parameters in candev_samd5x.h,
+the last filter won't be applied as the CAN controller supports up to 3 standard filters
+- For SAMD5x/E5x CAN controller, if you increase the maximum capacity of the standard
+filters (check Makefile.board.dep), the last filter can be applied correctly. */
 #if defined(MODULE_MCP2515)
     if (IS_ACTIVE(MCP2515_RECV_FILTER_EN)) {
 #endif
         /* CAN filters examples */
         struct can_filter filter[4];
         filter[0].can_mask = 0x7FF;
         filter[0].can_id = 0x001;
-#if !defined(__linux__)
+#if (MODULE_CAN_RX_MAILBOX)
         filter[0].target_mailbox = 0;
 #endif
         filter[1].can_mask = 0x7FF;
         filter[1].can_id = 0x002;
-#if !defined(__linux__)
+#if (MODULE_CAN_RX_MAILBOX)
         filter[1].target_mailbox = 1;
 #endif
         filter[2].can_mask = 0x7FF;
         filter[2].can_id = 0x003;
-#if !defined(__linux__)
+#if (MODULE_CAN_RX_MAILBOX)
         filter[2].target_mailbox = 0;
 #endif
         filter[3].can_mask = 0x7FF;
         filter[3].can_id = 0x004;
-#if !defined(__linux__)
+#if (MODULE_CAN_RX_MAILBOX)
         filter[3].target_mailbox = 1;
 #endif
         for (uint8_t i = 0; i < 4; i++) {