rcar_gen3: drivers: ddr-a: Pass ddrBackup around

Pass the ddrBackup variable around instead of making it a global variable.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Change-Id: Ib796181247712e464b77f5f8be5f851745727d74
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NOTE: The camelcase is fixed in later patch.
1 file changed