ddr: imx8m: Add DRAM PLL to generate 1000Mhz output

We will generate DRAM 4000MT/s as default for i.MX8MP.
So need DRAM PLL to generate 1000Mhz clock to DDR PHY and controller.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
1 file changed