video: fbdev: make fb_var_screeninfo const

Make these const as they are not modified anywhere.

Signed-off-by: Bhumika Goyal <[e-mail]>
Cc: Julia Lawall <[e-mail]>
Cc: Guan Xuetao <[e-mail]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[e-mail]>

drivers/video/fbdev/fb-puv3.c

···
 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 };
 
-static struct fb_var_screeninfo unifb_default = {
+static const struct fb_var_screeninfo unifb_default = {
 	.xres =		640,
 	.yres =		480,
 	.xres_virtual =	640,

drivers/video/fbdev/maxinefb.c

···
 
 static struct fb_info fb_info;
 
-static struct fb_var_screeninfo maxinefb_defined = {
+static const struct fb_var_screeninfo maxinefb_defined = {
 	.xres =		1024,
 	.yres =		768,
 	.xres_virtual =	1024,

drivers/video/fbdev/pmag-aa-fb.c

···
 	struct bt431_regs __iomem *bt431;
 };
 
-static struct fb_var_screeninfo aafb_defined = {
+static const struct fb_var_screeninfo aafb_defined = {
 	.xres		= 1280,
 	.yres		= 1024,
 	.xres_virtual	= 2048,

drivers/video/fbdev/pmag-ba-fb.c

···
 };
 
 
-static struct fb_var_screeninfo pmagbafb_defined = {
+static const struct fb_var_screeninfo pmagbafb_defined = {
 	.xres		= 1024,
 	.yres		= 864,
 	.xres_virtual	= 1024,

drivers/video/fbdev/pmagb-b-fb.c

···
 };
 
 
-static struct fb_var_screeninfo pmagbbfb_defined = {
+static const struct fb_var_screeninfo pmagbbfb_defined = {
 	.bits_per_pixel	= 8,
 	.red.length	= 8,
 	.green.length	= 8,

drivers/video/fbdev/pvr2fb.c

···
 	.accel =	FB_ACCEL_NONE,
 };
 
-static struct fb_var_screeninfo pvr2_var = {
+static const struct fb_var_screeninfo pvr2_var = {
 	.xres =		640,
 	.yres =		480,
 	.xres_virtual =	640,

drivers/video/fbdev/q40fb.c

···
 	.accel		= FB_ACCEL_NONE,
 };
 
-static struct fb_var_screeninfo q40fb_var = {
+static const struct fb_var_screeninfo q40fb_var = {
 	.xres		= 1024,
 	.yres		= 512,
 	.xres_virtual	= 1024,