configs: mpc85xx: fix fallout from SPL/TPL changes

Splitting the feature selection for SPL and TPL, caused a few build
failures to mpx85xx boards.  This fixes the fallout by adding the
needed new option names to the respective defconfig files.

Signed-off-byL Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
diff --git a/configs/P1025RDB_NAND_defconfig b/configs/P1025RDB_NAND_defconfig
index 7fd6414..a3e00de 100644
--- a/configs/P1025RDB_NAND_defconfig
+++ b/configs/P1025RDB_NAND_defconfig
@@ -2,7 +2,6 @@
 CONFIG_SPL_SERIAL_SUPPORT=y
 CONFIG_TPL_LIBCOMMON_SUPPORT=y
 CONFIG_TPL_LIBGENERIC_SUPPORT=y
-CONFIG_TPL_SERIAL_SUPPORT=y
 CONFIG_SPL_NAND_SUPPORT=y
 CONFIG_MPC85xx=y
 # CONFIG_CMD_ERRATA is not set
@@ -20,6 +19,7 @@
 CONFIG_TPL_I2C_SUPPORT=y
 CONFIG_TPL_MPC8XXX_INIT_DDR_SUPPORT=y
 CONFIG_TPL_NAND_SUPPORT=y
+CONFIG_TPL_SERIAL_SUPPORT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_NAND=y