cmd_i2c: moved a define to before the functions

Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>

common/cmd_i2c.c

@@ -130,6 +130,8 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #endif
 
+#define DISP_LINE_LEN	16
+
 /* TODO: Implement architecture-specific get/set functions */
 unsigned int __def_i2c_get_bus_speed(void)
 {
@@ -148,8 +150,6 @@ int __def_i2c_set_bus_speed(unsigned int speed)
 int i2c_set_bus_speed(unsigned int)
 	__attribute__((weak, alias("__def_i2c_set_bus_speed")));
 
-#define DISP_LINE_LEN	16
-
 /*
  * Syntax:
  *	i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}