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Setting up firewall regions based on SDRAM memory banks configuration (up to CONFIG_NR_DRAM_BANKS banks) instead of using whole address space. First 1 MiB (0 to 0xfffff) of SDRAM is configured as secure region, other address spaces are non-secure regions. The ARM Trusted Firmware (ATF) image is located in this first 1 MiB memory region. So, this can prevent software executing at non-secure state EL0-EL2 and non-secure masters access to secure region. Add common function for firewall setup and reuse for all SoC64 devices. Signed-off-by: Alif Zakuan Yuslaimi <alif.zakuan.yuslaimi@altera.com> Reviewed-by: Tien Fong Chee <tien.fong.chee@altera.com>