imx: Explicitly pass the I2C bus number in pmic_init()

The pmic_init() function has the I2C or SPI bus number that is connected to the
PMIC.

Instead of passing I2C_PMIC, explicitly pass the I2C bus number via I2C_x
definition.

The motivation for doing this is to avoid people just doing a copy and paste
of I2C_PMIC into their board file when another I2C bus is actually used to
interface to their PMIC.

This also makes more obvious which is the I2C bus connected to the PMIC, without
having to search in the source code for the meaning of the 'I2C_PMIC' number.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Stefano Babic <sbabic@denx.de>
diff --git a/board/freescale/mx25pdk/mx25pdk.c b/board/freescale/mx25pdk/mx25pdk.c
index ebe3bcb..71a395c 100644
--- a/board/freescale/mx25pdk/mx25pdk.c
+++ b/board/freescale/mx25pdk/mx25pdk.c
@@ -138,7 +138,7 @@
 
 	mx25pdk_fec_init();
 
-	ret = pmic_init(I2C_PMIC);
+	ret = pmic_init(I2C_0);
 	if (ret)
 		return ret;
 
diff --git a/board/freescale/mx35pdk/mx35pdk.c b/board/freescale/mx35pdk/mx35pdk.c
index 9fabef5..12467a9 100644
--- a/board/freescale/mx35pdk/mx35pdk.c
+++ b/board/freescale/mx35pdk/mx35pdk.c
@@ -213,7 +213,7 @@
 	struct pmic *p;
 	int ret;
 
-	ret = pmic_init(I2C_PMIC);
+	ret = pmic_init(I2C_0);
 	if (ret)
 		return ret;
 
diff --git a/board/freescale/mx53evk/mx53evk.c b/board/freescale/mx53evk/mx53evk.c
index 3b398b6..13519e2 100644
--- a/board/freescale/mx53evk/mx53evk.c
+++ b/board/freescale/mx53evk/mx53evk.c
@@ -81,7 +81,7 @@
 	struct pmic *p;
 	int ret;
 
-	ret = pmic_init(I2C_PMIC);
+	ret = pmic_init(I2C_0);
 	if (ret)
 		return;
 
diff --git a/board/freescale/mx53loco/mx53loco.c b/board/freescale/mx53loco/mx53loco.c
index ae7eca8..db0bf17 100644
--- a/board/freescale/mx53loco/mx53loco.c
+++ b/board/freescale/mx53loco/mx53loco.c
@@ -258,7 +258,7 @@
 	}
 
 	if (!i2c_probe(CONFIG_SYS_FSL_PMIC_I2C_ADDR)) {
-		ret = pmic_init(I2C_PMIC);
+		ret = pmic_init(I2C_0);
 		if (ret)
 			return ret;