NOR/DRIVERS: review scope of functions

Add "static" qualifier to private functions.
Remove unused "extern" in src/ecosboard.c

Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>

src/ecosboard.c

@@ -99,9 +99,6 @@ static bool writeLog = true;
 
 char hwaddr[512];
 
-
-extern struct flash_driver *flash_drivers[];
-
 #ifdef CYGPKG_PROFILE_GPROF
 #include <cyg/profile/profile.h>
 

src/flash/nor/drivers.c

@@ -44,7 +44,7 @@ extern struct flash_driver faux_flash;
  * The list of built-in flash drivers.
  * @todo Make this dynamically extendable with loadable modules.
  */
-struct flash_driver *flash_drivers[] = {
+static struct flash_driver *flash_drivers[] = {
 	&lpc2000_flash,
 	&lpc288x_flash,
 	&lpc2900_flash,