ti: Convert CONFIG_TI_EDMA3 to Kconfig

This converts the following to Kconfig:
   CONFIG_TI_EDMA3

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/configs/k2e_hs_evm_defconfig b/configs/k2e_hs_evm_defconfig
index f0685c0..0978b1b 100644
--- a/configs/k2e_hs_evm_defconfig
+++ b/configs/k2e_hs_evm_defconfig
@@ -40,6 +40,7 @@
 CONFIG_BOOTP_SEND_HOSTNAME=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_DM=y
+CONFIG_TI_EDMA3=y
 CONFIG_SPL_SYS_I2C_LEGACY=y
 CONFIG_SYS_I2C_DAVINCI=y
 CONFIG_TI_AEMIF=y