staging: fbtft: fix allyesconfig build

There are two functions call reset() so the allyesconfig breaks. Let's
make this one static.

Reported-by: Jim Davis <[e-mail]>
Signed-off-by: Dan Carpenter <[e-mail]>
Tested-by: Jim Davis <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/fbtft/fb_agm1264k-fl.c

···
 	return 0;
 }
 
-void reset(struct fbtft_par *par)
+static void reset(struct fbtft_par *par)
 {
 	if (par->gpio.reset == -1)
 		return;