[DRIVER][SDIO] Add components initializer.

components/drivers/include/drivers/mmcsd_core.h

@@ -247,9 +247,9 @@ void mmcsd_change(struct rt_mmcsd_host *host);
 void mmcsd_detect(void *param);
 struct rt_mmcsd_host *mmcsd_alloc_host(void);
 void mmcsd_free_host(struct rt_mmcsd_host *host);
-void rt_mmcsd_core_init(void);
+int rt_mmcsd_core_init(void);
 
-void rt_mmcsd_blk_init(void);
+int rt_mmcsd_blk_init(void);
 rt_int32_t rt_mmcsd_blk_probe(struct rt_mmcsd_card *card);
 void rt_mmcsd_blk_remove(struct rt_mmcsd_card *card);
 

components/drivers/sdio/block_dev.c

@@ -479,8 +479,11 @@ void rt_mmcsd_blk_remove(struct rt_mmcsd_card *card)
  * @deprecated since 2.1.0, this function does not need to be invoked
  * in the system initialization.
  */
-void rt_mmcsd_blk_init(void)
+int rt_mmcsd_blk_init(void)
 {
-	/* nothing */
+    /* nothing */
+    return 0;
 }
 
+INIT_PREV_EXPORT(rt_mmcsd_blk_init);
+

components/drivers/sdio/mmcsd_core.c

@@ -726,7 +726,7 @@ void mmcsd_free_host(struct rt_mmcsd_host *host)
     rt_free(host);
 }
 
-void rt_mmcsd_core_init(void)
+int rt_mmcsd_core_init(void)
 {
     rt_err_t ret;
 
@@ -751,3 +751,5 @@ void rt_mmcsd_core_init(void)
     rt_sdio_init();
 }
 
+INIT_PREV_EXPORT(rt_mmcsd_core_init);
+