games/snake: Change consolekey magic numbers with ASCII macros

Change consolekey magic numbers with ascii values to make it more understandable

Signed-off-by: Eren Terzioglu <eren.terzioglu@espressif.com>

Author: eren-terzioglu

games/snake/snake_input_console.h

@@ -25,6 +25,7 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
+#include <nuttx/ascii.h>
 #include <termios.h>
 
 #include "snake_inputs.h"
@@ -188,24 +189,24 @@ int dev_read_input(FAR struct input_state_s *dev)
 
   /* Arrows keys return three bytes: 27 91 [65-68] */
 
-  if ((ch = getch()) == 27)
+  if ((ch = getch()) == ASCII_ESC)
     {
-      if ((ch = getch()) == 91)
+      if ((ch = getch()) == ASCII_LBRACKET)
         {
           ch = getch();
-          if (ch == 65)
+          if (ch == ASCII_A)
             {
               dev->dir = DIR_UP;
             }
-          else if (ch == 66)
+          else if (ch == ASCII_B)
             {
               dev->dir = DIR_DOWN;
             }
-          else if (ch == 67)
+          else if (ch == ASCII_C)
             {
               dev->dir = DIR_RIGHT;
             }
-          else if (ch == 68)
+          else if (ch == ASCII_D)
             {
               dev->dir = DIR_LEFT;
             }