video: fbdev: arcfb: remove redundant initialization of variable err

The variable err is being initialized with a value that is never
read, the assignment is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210721102608.42694-1-colin.king@canonical.com

drivers/video/fbdev/arcfb.c

@@ -446,7 +446,7 @@ static ssize_t arcfb_write(struct fb_info *info, const char __user *buf,
 	/* modded from epson 1355 */
 
 	unsigned long p;
-	int err=-EINVAL;
+	int err;
 	unsigned int fbmemlength,x,y,w,h, bitppos, startpos, endpos, bitcount;
 	struct arcfb_par *par;
 	unsigned int xres;