arm: pdu001: Fix dt to work with the current am33xx dtsi files

The changes introduced with commit 6337d53fdf45 ("arm: dts: sync am33xx
with Linux 5.9-rc7") prevent the PDU001 from operating correctly.
This patch fixes the configuration of the pin multiplexer and uart3.

Signed-off-by: Felix Brack <fb@ltec.ch>
diff --git a/arch/arm/dts/am335x-pdu001-u-boot.dtsi b/arch/arm/dts/am335x-pdu001-u-boot.dtsi
index 686a152..f1860ee 100644
--- a/arch/arm/dts/am335x-pdu001-u-boot.dtsi
+++ b/arch/arm/dts/am335x-pdu001-u-boot.dtsi
@@ -5,17 +5,25 @@
 
 #include "am33xx-u-boot.dtsi"
 
-/ {
-	ocp {
-		u-boot,dm-pre-reloc;
+&l4_wkup {
+	u-boot,dm-pre-reloc;
+	segment@200000 {
+
+		target-module@10000 {
+			u-boot,dm-pre-reloc;
+		};
 	};
 };
 
-&l4_wkup {
-	u-boot,dm-pre-reloc;
-};
-
 &l4_per {
+	u-boot,dm-pre-reloc;
+	segment@100000 {
+		u-boot,dm-pre-reloc;
+
+		target-module@a6000 {
+			u-boot,dm-pre-reloc;
+		};
+	};
 
 	segment@300000 {
 
diff --git a/configs/am335x_pdu001_defconfig b/configs/am335x_pdu001_defconfig
index 1c4c711..1381cc7 100644
--- a/configs/am335x_pdu001_defconfig
+++ b/configs/am335x_pdu001_defconfig
@@ -35,8 +35,10 @@
 CONFIG_CMD_REGULATOR=y
 CONFIG_OF_CONTROL=y
 CONFIG_SPL_OF_CONTROL=y
+CONFIG_SPL_OF_TRANSLATE=y
 CONFIG_ENV_OVERWRITE=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_SYS_MALLOC_F_LEN=0x1200
 # CONFIG_NET is not set
 CONFIG_SPL_DM=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
@@ -45,6 +47,8 @@
 CONFIG_MMC_SDHCI=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_SINGLE=y
+CONFIG_CLK=y
+CONFIG_CLK_TI_CTRL=y
 CONFIG_DM_PMIC=y
 CONFIG_DM_PMIC_TPS65910=y
 CONFIG_DM_REGULATOR=y