[MTD NAND] Make various initfuncs static, remove #ifdef MODULE from exitfuncs

We all inherited the same error from the original NAND board driver which
got copied and changed. Fix them all at once...

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/drivers/mtd/nand/toto.c b/drivers/mtd/nand/toto.c
index 24cfa9e..c51c895 100644
--- a/drivers/mtd/nand/toto.c
+++ b/drivers/mtd/nand/toto.c
@@ -115,7 +115,7 @@
 /*
  * Main initialization routine
  */
-int __init toto_init(void)
+static int __init toto_init(void)
 {
 	struct nand_chip *this;
 	int err = 0;