fbdev/mb862xx: Do not include <linux/export.h>

Fix the compile-time warning

  drivers/video/fbdev/mb862xx/mb862xx-i2c.c: warning: EXPORT_SYMBOL() is not used, but #include <linux/export.h> is present

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Fixes: 7d95680 ("scripts/misc-check: check unnecessary #include <linux/export.h> when W=1")
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20250612081738.197826-11-tzimmermann@suse.de

Author: tdz

drivers/video/fbdev/mb862xx/mb862xx-i2c.c

@@ -9,7 +9,6 @@
 #include <linux/i2c.h>
 #include <linux/io.h>
 #include <linux/delay.h>
-#include <linux/export.h>
 
 #include "mb862xxfb.h"
 #include "mb862xx_reg.h"