Try MSEL=00000
I made same mistake and was stuck for months. Look at DE1-SoC User Guide Table 3-2. The third option. FPPx16 is the on with U-Boot in the description and is MSEL=5’b00000.
Try MSEL=00000
I made same mistake and was stuck for months. Look at DE1-SoC User Guide Table 3-2. The third option. FPPx16 is the on with U-Boot in the description and is MSEL=5’b00000.