minimal-printf: README updates

Author: bulislaw

platform/mbed_lib.json

@@ -140,15 +140,15 @@
             "value": true
         },
         "minimal-printf-enable-64-bit": {
-            "help": "Enable printing 64 bit integers when using mprintf profile",
+            "help": "Enable printing 64 bit integers when using minimal printf library",
             "value": true
         },
         "minimal-printf-enable-floating-point": {
-            "help": "Enable floating point printing when using mprintf profile",
+            "help": "Enable floating point printing when using minimal printf library",
             "value": true
         },
         "minimal-printf-set-floating-point-max-decimals": {
-            "help": "Maximum number of decimals to be printed",
+            "help": "Maximum number of decimals to be printed when using minimal printf library",
             "value": 6
         }
     },

platform/source/minimal-printf/README.md

@@ -1,7 +1,7 @@
 # Minimal printf and snprintf
 
 
-Library supports both printf and snprintf in 1252 bytes of flash.
+Library supports both printf and snprintf in around 1300 bytes of flash.
 
 Prints directly to stdio/UART without using malloc. All flags and precision modifiers are ignored.
 There is no error handling if a writing error occurs.
@@ -20,6 +20,10 @@ Supports:
 * %s: string.
 * %p: pointer (e.g. 0x00123456).
 
+Note that support for:
+* 64b modifiers is only present when `minimal-printf-enable-64-bit` config is set to `true` (default).
+* Floating point parameters is only present when `minimal-printf-enable-floating-point` config is set to `true` (default).
+
 Unrecognized format specifiers are treated as ordinary characters.
 
 Floating point limitations: