OMAP3 Move twl4030 power and led functions

Because twl4030 now has its own device files, move exiting
omap3 power_init_r to a new location.

power_init_r is the only function in board/omap3/common.
It initializes the twl4030 power for the board and enables
the led.

The power part of the the function is moved to twl4030_power_init in
drivers/power/twl4030.c The power compilation is conditional on the
existing config variable CONFIG_TWL4030_POWER.

The led part is moved to twl4030_led_init in the new file
drivers/misc/twl4030_led.c  The led compilation is conditional on
the new config variable CONFIG_TWL4030_LED

The directory board/omap3/common was removed because power_init_r
was the only function in it.

Signed-off-by: Tom Rix <Tom.Rix@windriver.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Heiko Schocher <hs@denx.de>
diff --git a/board/omap3/overo/overo.c b/board/omap3/overo/overo.c
index 809b77b..dd6d286 100644
--- a/board/omap3/overo/overo.c
+++ b/board/omap3/overo/overo.c
@@ -29,6 +29,7 @@
  * MA 02111-1307 USA
  */
 #include <common.h>
+#include <twl4030.h>
 #include <asm/io.h>
 #include <asm/arch/mux.h>
 #include <asm/arch/sys_proto.h>
@@ -58,7 +59,8 @@
  */
 int misc_init_r(void)
 {
-	power_init_r();
+	twl4030_power_init();
+	twl4030_led_init();
 
 	dieid_num_r();