ARM: footbridge: drop unnecessary inclusion

isa-rtc.c doesn't use any definition from bcd.h, remove its inclusion

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20221212135953.212303-1-alexandre.belloni@bootlin.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-footbridge/isa-rtc.c

@@ -20,7 +20,6 @@
 
 #include <linux/init.h>
 #include <linux/mc146818rtc.h>
-#include <linux/bcd.h>
 #include <linux/io.h>
 
 #include "common.h"