RTC: rtc-cmos.c: Fix warning on MIPS

This patch fixes the following warning with RTC_LIB on MIPS:

drivers/rtc/rtc-cmos.c:697:2: warning: #warning Assuming 128 bytes of
RTC+NVRAM address space, not 64 bytes.

Signed-off-by: Wu Zhangjin <[e-mail]>
Cc: Arnaud Patard <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: Paul Gortmaker <[e-mail]>
Cc: Alessandro Zummo <[e-mail]>
Patchwork: http://patchwork.linux-mips.org/patch/570/
Acked-by: Alessandro Zummo <[e-mail]>
Signed-off-by: Ralf Baechle <[e-mail]>

drivers/rtc/rtc-cmos.c

···
 	 */
 #if	defined(CONFIG_ATARI)
 	address_space = 64;
-#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) || defined(__sparc__)
+#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) \
+			|| defined(__sparc__) || defined(__mips__)
 	address_space = 128;
 #else
 #warning Assuming 128 bytes of RTC+NVRAM address space, not 64 bytes.