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/gwventana_nand_defconfig b/configs/gwventana_nand_defconfig
index a41b3c4..d3d4876 100644
--- a/configs/gwventana_nand_defconfig
+++ b/configs/gwventana_nand_defconfig
@@ -129,6 +129,8 @@
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y
 CONFIG_POWER_LEGACY=y
+CONFIG_POWER_LTC3676=y
+CONFIG_POWER_PFUZE100=y
 CONFIG_DM_REGULATOR=y
 CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_POWER_I2C=y