fbdev/g364fb: fix build failure with mips

Fix the typo which resulted in the driver using FB_DEFAULT_IOMEM_HELPERS
instead of FB_DEFAULT_IOMEM_OPS as the fbdev I/O helpers.

Fixes: 50112608 ("fbdev/g364fb: Use fbdev I/O helpers")
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230902095102.5908-1-sudip.mukherjee@codethink.co.uk

drivers/video/fbdev/g364fb.c

@@ -112,7 +112,7 @@ static int g364fb_blank(int blank, struct fb_info *info);
 
 static const struct fb_ops g364fb_ops = {
 	.owner		= THIS_MODULE,
-	FB_DEFAULT_IOMEM_HELPERS,
+	FB_DEFAULT_IOMEM_OPS,
 	.fb_setcolreg	= g364fb_setcolreg,
 	.fb_pan_display	= g364fb_pan_display,
 	.fb_blank	= g364fb_blank,