Standardise remaining uses of SDK to ESP-IDF

components/nvs_flash/Makefile

@@ -1,11 +1,6 @@
 #
 # Component Makefile
 #
-# This Makefile should, at the very least, just include $(SDK_PATH)/Makefile. By default, 
-# this will take the sources in this directory, compile them and link them into 
-# lib(subdirectory_name).a in the build directory. This behaviour is entirely configurable,
-# please read the SDK documents if you need to do this.
-#
 
 COMPONENT_ADD_INCLUDEDIRS := include
 

components/nvs_flash/include/nvs.h

@@ -49,9 +49,9 @@ typedef enum {
 /**
  * @brief      Open non-volatile storage with a given namespace
  *
- * Multiple SDK and application modules can store their key-value pairs in the
- * NVS module. In order to reduce possible conflicts on key names, each module
- * can use its own namespace.
+ * Multiple internal ESP-IDF and third party application modules can store
+ * their key-value pairs in the NVS module. In order to reduce possible
+ * conflicts on key names, each module can use its own namespace.
  *
  * @param[in]  name        Namespace name. Maximal length is determined by the
  *                         underlying implementation, but is guaranteed to be