ARM: am3517-evm: Enable DM_PMIC and DM_REGULATOR functions

The PBIAS regulator is available on OMAP3's, and it's shared on
the AM35, so this patch enables that in U-Boot along with GPIO
based regulators.

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/configs/am3517_evm_defconfig b/configs/am3517_evm_defconfig
index 5cb7632..9390035 100644
--- a/configs/am3517_evm_defconfig
+++ b/configs/am3517_evm_defconfig
@@ -17,6 +17,7 @@
 # CONFIG_SPL_FS_EXT4 is not set
 CONFIG_SPL_MTD_SUPPORT=y
 CONFIG_SPL_OS_BOOT=y
+# CONFIG_SPL_POWER_SUPPORT is not set
 CONFIG_SYS_PROMPT="AM3517_EVM # "
 # CONFIG_CMD_IMI is not set
 CONFIG_CMD_SPL=y
@@ -49,6 +50,11 @@
 CONFIG_DRIVER_TI_EMAC=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_SINGLE=y
+CONFIG_DM_PMIC=y
+# CONFIG_SPL_PMIC_CHILDREN is not set
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_GPIO=y
 # CONFIG_TWL4030_POWER is not set
 CONFIG_CONS_INDEX=3
 CONFIG_SPI=y