rtc: pcf8523: always compile pcf8523_rtc_ioctl

Compiling out pcf8523_rtc_ioctl saves about 5% of the generated machine
code. However, it certainly never happens as the RTC character device
interface is the most useful one and is probably always compiled in.

Signed-off-by: Alexandre Belloni <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/rtc/rtc-pcf8523.c

···
 	return 0;
 }
 
-#ifdef CONFIG_RTC_INTF_DEV
 static int pcf8523_rtc_ioctl(struct device *dev, unsigned int cmd,
 			     unsigned long arg)
 {
···
 		return -ENOIOCTLCMD;
 	}
 }
-#else
-#define pcf8523_rtc_ioctl NULL
-#endif
 
 static int pcf8523_rtc_read_offset(struct device *dev, long *offset)
 {