[MTD] Auto-load mtdchar module when device opened.

The mtdchar module is missing the char-major-90-* alias that would cause
it to be auto-loaded when a device of that type is opened.  This patch
adds the alia..

Signed-off-by: Scott James Remnant <scott@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index e9ec59e..2c8a16f 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -825,3 +825,4 @@
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
 MODULE_DESCRIPTION("Direct character-device access to MTD devices");
+MODULE_ALIAS_CHARDEV_MAJOR(MTD_CHAR_MAJOR);