[MIPS] Malta: make the helper function static

One helper function can become static. This patch adds the needed
keyword.

No functional changes introduced.
Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/mips-boards/malta/malta_setup.c

@@ -80,7 +80,7 @@ const char display_string[] = "        LINUX ON MALTA       ";
 #endif /* CONFIG_MIPS_MT_SMTC */
 
 #ifdef CONFIG_BLK_DEV_FD
-void __init fd_activate(void)
+static void __init fd_activate(void)
 {
 	/*
 	 * Activate Floppy Controller in the SMSC FDC37M817 Super I/O