rcar_gen3: drivers: ddr-a: Inline ddr_init_e3.h

Partly inline ddr_init_e3.h into ddr_init_e3.c . Drop duplicate
INITDRAM_* macros, which are defined in boot_init_dram.h .

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Change-Id: I758661d337a86b6a07f82cd4067fbc149cbaed1e
2 files changed