backlight: jornada720_lcd: Include <linux/io.h> for IOMEM() macro

Avoids the proxy include via <linux/fb.h>.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Link: https://lore.kernel.org/r/20240906075439.98476-9-tzimmermann@suse.de
Signed-off-by: Lee Jones <lee@kernel.org>

Author: tdz

drivers/video/backlight/jornada720_lcd.c

@@ -7,6 +7,7 @@
 
 #include <linux/device.h>
 #include <linux/fb.h>
+#include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/lcd.h>
 #include <linux/module.h>