omap: i2c: Fix muxing for command line enabled bus

The commit b63128e81214cc2db2995d690438055c26d213a5 broke the pin muxing
for I2C busses that are enabled from the kernel command line.

Fix this by defining the board registration function omap_register_i2c_bus
in common platform code as it was before but keep the muxing in architecture
dependent files.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/plat-omap/i2c.c b/arch/arm/plat-omap/i2c.c
index 96d2781..624e262 100644
--- a/arch/arm/plat-omap/i2c.c
+++ b/arch/arm/plat-omap/i2c.c
@@ -28,6 +28,7 @@
 #include <linux/i2c.h>
 #include <mach/irqs.h>
 #include <plat/mux.h>
+#include <plat/i2c.h>
 
 #define OMAP_I2C_SIZE		0x3f
 #define OMAP1_I2C_BASE		0xfffb3800
@@ -117,6 +118,11 @@
 		res[1].start = irq;
 	}
 
+	if (cpu_class_is_omap1())
+		omap1_i2c_mux_pins(bus_id);
+	if (cpu_class_is_omap2())
+		omap2_i2c_mux_pins(bus_id);
+
 	return platform_device_register(pdev);
 }
 
@@ -169,7 +175,7 @@
 subsys_initcall(omap_register_i2c_bus_cmdline);
 
 /**
- * omap_plat_register_i2c_bus - register I2C bus with device descriptors
+ * omap_register_i2c_bus - register I2C bus with device descriptors
  * @bus_id: bus id counting from number 1
  * @clkrate: clock rate of the bus in kHz
  * @info: pointer into I2C device descriptor table or NULL
@@ -177,7 +183,7 @@
  *
  * Returns 0 on success or an error code.
  */
-int __init omap_plat_register_i2c_bus(int bus_id, u32 clkrate,
+int __init omap_register_i2c_bus(int bus_id, u32 clkrate,
 			  struct i2c_board_info const *info,
 			  unsigned len)
 {