Revert changes in the configs folder

Revert the changes in the `configs` folder to
align with the `README.txt` file.
diff --git a/configs/config-ccm-psk-tls1_2.h b/configs/config-ccm-psk-tls1_2.h
index bd37091..aee10b8 100644
--- a/configs/config-ccm-psk-tls1_2.h
+++ b/configs/config-ccm-psk-tls1_2.h
@@ -80,6 +80,6 @@
  */
 #define MBEDTLS_SSL_MAX_CONTENT_LEN             512
 
-#include "check_config.h"
+#include "mbedtls/check_config.h"
 
 #endif /* MBEDTLS_CONFIG_H */
diff --git a/configs/config-mini-tls1_1.h b/configs/config-mini-tls1_1.h
index cd32282..e22363d 100644
--- a/configs/config-mini-tls1_1.h
+++ b/configs/config-mini-tls1_1.h
@@ -70,6 +70,6 @@
 /* For testing with compat.sh */
 #define MBEDTLS_FS_IO
 
-#include "check_config.h"
+#include "mbedtls/check_config.h"
 
 #endif /* MBEDTLS_CONFIG_H */
diff --git a/configs/config-suite-b.h b/configs/config-suite-b.h
index 5567d29..3c4804c 100644
--- a/configs/config-suite-b.h
+++ b/configs/config-suite-b.h
@@ -109,6 +109,6 @@
  */
 #define MBEDTLS_SSL_MAX_CONTENT_LEN             1024
 
-#include "check_config.h"
+#include "mbedtls/check_config.h"
 
 #endif /* MBEDTLS_CONFIG_H */