fix(imx8m): align 3200 MTps rate with U-Boot

The 3200 MTps DRAM and its 800 MHz PLL setting in U-Boot is set to
M=300 P=9 S=0 , so 24 MHz * 300 / 9 / 2^0 = 800 MHz ~ 3200 MTps (x4) .
Make sure the PLL settings are aligned across software components.

Signed-off-by: Marek Vasut <marex@denx.de>
Change-Id: I163f81696be213acf6ecebe89ff2c76d41484cc5
1 file changed