omap: use common initialization for PMIC i2c bus

Introduce omap_pmic_init that registers i2c bus and PMIC device on that
bus and add omap2/3/4 wrappers for common cases.

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/board-omap3touchbook.c b/arch/arm/mach-omap2/board-omap3touchbook.c
index 15f9d7d..0a9b329 100644
--- a/arch/arm/mach-omap2/board-omap3touchbook.c
+++ b/arch/arm/mach-omap2/board-omap3touchbook.c
@@ -274,15 +274,6 @@
 	.vpll2		= &touchbook_vpll2,
 };
 
-static struct i2c_board_info __initdata touchbook_i2c_boardinfo[] = {
-	{
-		I2C_BOARD_INFO("twl4030", 0x48),
-		.flags = I2C_CLIENT_WAKE,
-		.irq = INT_34XX_SYS_NIRQ,
-		.platform_data = &touchbook_twldata,
-	},
-};
-
 static struct i2c_board_info __initdata touchBook_i2c_boardinfo[] = {
 	{
 		I2C_BOARD_INFO("bq27200", 0x55),
@@ -292,8 +283,7 @@
 static int __init omap3_touchbook_i2c_init(void)
 {
 	/* Standard TouchBook bus */
-	omap_register_i2c_bus(1, 2600, touchbook_i2c_boardinfo,
-			ARRAY_SIZE(touchbook_i2c_boardinfo));
+	omap3_pmic_init("twl4030", &touchbook_twldata);
 
 	/* Additional TouchBook bus */
 	omap_register_i2c_bus(3, 100, touchBook_i2c_boardinfo,