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

Fix the compile-time warning

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

Signed-off-by: Thomas Zimmermann <[e-mail]>
Reviewed-by: Helge Deller <[e-mail]>
Fixes: 7d95680d64ac ("scripts/misc-check: check unnecessary #include <linux/export.h> when W=1")
Cc: Masahiro Yamada <[e-mail]>
Cc: Nathan Chancellor <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/video/fbdev/via/via-gpio.c

···
 #include <linux/gpio/machine.h>
 #include <linux/platform_device.h>
 #include <linux/via-core.h>
-#include <linux/export.h>
 #include "via-gpio.h"
 
 /*