make.py: Reduce integrated_sram_size to 0x1800 on all boards (except qmtech_ep4ce15 where configured to 0x800).
make.py: Reduce integrated_sram_size to 0x1800 on all boards (except qmtech_ep4ce15 where configured to 0x800).

litex-hub/linux-on-litex-vexriscv,litex-hub/linux-on-litex-vexriscv