sunxi: dram_sun4i/5i: use DRAM_MEMORY_TYPE_DDR3 instead of magic number 3

Since DRAM_MEMORY_TYPE_DDR3 is defined let's use it instead of magic
number 3.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
2 files changed