novena: Remove uneeded PHYS_SDRAM_SIZE
novena uses the imx_ddr_size() function to calculate the DDR size in
runtime, so there is no need to define PHYS_SDRAM_SIZE.
Remove the unneeded definition.
Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Acked-by: Marek Vasut <marex@denx.de>
Fabio Estevam