ARM: dra7xx_evm: Enable regulator DM support

Enable DM based regulator framework and also fixed regulator support as
some IPs like mmc use regulators for there functioning.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/dra7xx_hs_evm_defconfig b/configs/dra7xx_hs_evm_defconfig
index ab68b1c..ae08e6d 100644
--- a/configs/dra7xx_hs_evm_defconfig
+++ b/configs/dra7xx_hs_evm_defconfig
@@ -62,3 +62,6 @@
 CONFIG_OF_LIST="dra7-evm dra72-evm"
 CONFIG_DM_I2C=y
 CONFIG_PCF8575_GPIO=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_CMD_REGULATOR=y