rtc: add NXP PCF2127 support (i2c)

Added support for NXP PCF2127 RTC (i2c).

[akpm@linux-foundation.org: fix typo, fix warnings]
Signed-off-by: Renaud Cerrato <r.cerrato@til-technologies.fr>
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index b983813..8009e5d 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -313,6 +313,15 @@
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-palma.
 
+config RTC_DRV_PCF2127
+	tristate "NXP PCF2127"
+	help
+	  If you say yes here you get support for the NXP PCF2127/29 RTC
+	  chips.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-pcf2127.
+
 config RTC_DRV_PCF8523
 	tristate "NXP PCF8523"
 	help