arm: sunxi: Enable DRAM ODT by default on H3/H5

Most of the boards we support with H3/H5 enable DRAM on-die termination,
which is consistent with the high DRAM clocks that are used.

Make it the default (like it's done for other similar platforms) instead
of defining it in each defconfig.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
diff --git a/configs/nanopi_neo_plus2_defconfig b/configs/nanopi_neo_plus2_defconfig
index 88c76a5..11cb8f6 100644
--- a/configs/nanopi_neo_plus2_defconfig
+++ b/configs/nanopi_neo_plus2_defconfig
@@ -4,6 +4,7 @@
 CONFIG_MACH_SUN50I_H5=y
 CONFIG_DRAM_CLK=408
 CONFIG_DRAM_ZQ=3881977
+# CONFIG_DRAM_ODT_EN is not set
 CONFIG_MACPWR="PD6"
 CONFIG_MMC_SUNXI_SLOT_EXTRA=2
 CONFIG_NR_DRAM_BANKS=1