ppc: xilinx-ppc4xx: Port to DM serial

xilinx_uartlite has been ported to DM, this patch makes the
xilinx-ppc405-generic and the xilinx-ppc440-generic boards use the new
DM driver.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Acked-by: Stefan Roese <sr@denx.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/powerpc/cpu/ppc4xx/Kconfig b/arch/powerpc/cpu/ppc4xx/Kconfig
index 3959585..36af1b9 100644
--- a/arch/powerpc/cpu/ppc4xx/Kconfig
+++ b/arch/powerpc/cpu/ppc4xx/Kconfig
@@ -111,9 +111,17 @@
 
 config TARGET_XILINX_PPC405_GENERIC
 	bool "Support xilinx-ppc405-generic"
+	select SUPPORT_SPL
+	select OF_CONTROL
+	select DM
+	select DM_SERIAL
 
 config TARGET_XILINX_PPC440_GENERIC
 	bool "Support xilinx-ppc440-generic"
+	select SUPPORT_SPL
+	select OF_CONTROL
+	select DM
+	select DM_SERIAL
 
 endchoice