Staging: fbtft: fixed unsigned type warnings

Replace unsigned by unsigned int in fbtft driver.  Issue found by
checkpatch.

Signed-off-by: Ming Yang <minos.future@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/fbtft/fb_ili9320.c b/drivers/staging/fbtft/fb_ili9320.c
index 6ff222d..278e4c7 100644
--- a/drivers/staging/fbtft/fb_ili9320.c
+++ b/drivers/staging/fbtft/fb_ili9320.c
@@ -29,7 +29,7 @@
 #define DEFAULT_GAMMA	"07 07 6 0 0 0 5 5 4 0\n" \
 			"07 08 4 7 5 1 2 0 7 7"
 
-static unsigned read_devicecode(struct fbtft_par *par)
+static unsigned int read_devicecode(struct fbtft_par *par)
 {
 	int ret;
 	u8 rxbuf[8] = {0, };
@@ -41,7 +41,7 @@
 
 static int init_display(struct fbtft_par *par)
 {
-	unsigned devcode;
+	unsigned int devcode;
 
 	par->fbtftops.reset(par);