Convert CONFIG_POWER_LTC3676 et al to Kconfig

This converts the following to Kconfig:
   CONFIG_POWER_FSL
   CONFIG_POWER_FSL_MC13892
   CONFIG_POWER_HI6553
   CONFIG_POWER_LTC3676
   CONFIG_POWER_PFUZE100
   CONFIG_POWER_PFUZE3000
   CONFIG_POWER_SPI
   CONFIG_POWER_TPS65090_EC
   CONFIG_POWER_TPS65218
   CONFIG_POWER_TPS65910

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/am43xx_evm_defconfig b/configs/am43xx_evm_defconfig
index 2dfd936..2faf132 100644
--- a/configs/am43xx_evm_defconfig
+++ b/configs/am43xx_evm_defconfig
@@ -88,6 +88,8 @@
 CONFIG_PHY=y
 CONFIG_SPL_PHY=y
 CONFIG_OMAP_USB2_PHY=y
+CONFIG_POWER_TPS65218=y
+CONFIG_POWER_TPS62362=y
 CONFIG_DM_SERIAL=y
 CONFIG_SPI=y
 CONFIG_TI_QSPI=y