Convert CONFIG_PALMAS_POWER to Kconfig

This converts the following to Kconfig:
   CONFIG_PALMAS_POWER

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/am57xx_hs_evm_defconfig b/configs/am57xx_hs_evm_defconfig
index 3320917..e22c11d 100644
--- a/configs/am57xx_hs_evm_defconfig
+++ b/configs/am57xx_hs_evm_defconfig
@@ -97,6 +97,7 @@
 CONFIG_PMIC_PALMAS=y
 CONFIG_DM_REGULATOR=y
 CONFIG_DM_REGULATOR_PALMAS=y
+CONFIG_PALMAS_POWER=y
 CONFIG_DM_SCSI=y
 CONFIG_DM_SERIAL=y
 CONFIG_SPI=y