MX: RTC13783 uses general function to access PMIC

The RTC is part of the Freescale's PMIC controller.
Use general function to access to PMIC internal registers.

Signed-off-by: Stefano Babic <sbabic@denx.de>
Tested-by: Magnus Lilja <lilja.magnus@gmail.com>
diff --git a/include/configs/imx31_litekit.h b/include/configs/imx31_litekit.h
index d58ca8a..4904856 100644
--- a/include/configs/imx31_litekit.h
+++ b/include/configs/imx31_litekit.h
@@ -68,10 +68,13 @@
 #define CONFIG_DEFAULT_SPI_BUS	1
 #define CONFIG_DEFAULT_SPI_MODE	(SPI_MODE_2 | SPI_CS_HIGH)
 
+#define CONFIG_FSL_PMIC
+#define CONFIG_FSL_PMIC_BUS	1
+#define CONFIG_FSL_PMIC_CS	0
+#define CONFIG_FSL_PMIC_CLK	1000000
+#define CONFIG_FSL_PMIC_MODE	(SPI_MODE_2 | SPI_CS_HIGH)
+
 #define CONFIG_RTC_MC13783	1
-/* MC13783 connected to CSPI2 and SS0 */
-#define CONFIG_MC13783_SPI_BUS	1
-#define CONFIG_MC13783_SPI_CS	0
 
 /* allow to overwrite serial and ethaddr */
 #define CONFIG_ENV_OVERWRITE