staging: dgnc: tty.c: edits var in init func for sparse

This patch edits the vaddr variable in dgnc_tty_init.
The variable gets set to board_t->re_map_membase. A
previous patch changed the re_map_membase variable's
marker and type. This patch makes sure that the
changes are consistent and that it doesn't cause
sparse warnings.
Signed-off-by: NLidza Louina <lidza.louina@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgnc/dgnc_tty.c

@@ -344,7 +344,7 @@ int dgnc_tty_register(struct board_t *brd)
 int dgnc_tty_init(struct board_t *brd)
 {
 	int i;
-	uchar *vaddr;
+	u8 __iomem *vaddr;
 	struct channel_t *ch;
 
 	if (!brd)