rcar_gen3: drivers: board: Add new board revision for H3ULCB

Board Revision[2:0]
 3'b000 Rev1.0 OB
 3'b001 Rev1.0 CE
 3'b010 Rev2.0	[New]

Signed-off-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Change-Id: I0f109cddc95eca78aea34c7149e70f14e2f1620b