rtc twl4030: rename ioctl function when RTC_INTF_DEV=n

Fix build error when RTC_INTF_DEV=n:

drivers/rtc/rtc-twl4030.c:402: error: 'twl4030_rtc_ioctl' undeclared here (not in a function)
make[3]: *** [drivers/rtc/rtc-twl4030.o] Error 1

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: David Brownell <[e-mail]>
Cc: Tony Lindgren <[e-mail]>
Cc: Samuel Ortiz <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/rtc/rtc-twl4030.c

···
 }
 
 #else
-#define	omap_rtc_ioctl	NULL
+#define	twl4030_rtc_ioctl	NULL
 #endif
 
 static irqreturn_t twl4030_rtc_interrupt(int irq, void *rtc)