Convert CONFIG_TWL4030_LED et al to Kconfig

This converts the following to Kconfig:
   CONFIG_TWL4030_LED
   CONFIG_TWL4030_INPUT

This also removes dead references to:
   CONFIG_TWL4030_KEYPAD

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/configs/tricorder_defconfig b/configs/tricorder_defconfig
index 98c2cbd..f92d391 100644
--- a/configs/tricorder_defconfig
+++ b/configs/tricorder_defconfig
@@ -34,6 +34,7 @@
 CONFIG_LED_STATUS_BIT2=4
 CONFIG_LED_STATUS_STATE2=2
 CONFIG_LED_STATUS_CMD=y
+CONFIG_TWL4030_LED=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_NAND=y
 CONFIG_SPL_NAND_SIMPLE=y