Fix memory size detection for 1.5GB Orange Pi Zero 3 board on v2024.01 u-boot release

[voapilro]

Description

This is to fix wrong DRAM size detection in Orange Pi Zero 3 board with 1.5GB DRAM. Currently they are not able to boot as they detect 2GB DRAM, so after applying this patch they will boot normally. Other boards with 1GB/2GB/4GB DRAM will continue working the same way with this patch.

This patch would only be applied to u-boot v2024.01 release. I will provide other patch for u-boot v2024.04 and newer. Well, we are not in rush, as I could see in configuracion files involved, config/sources/families/include/sunxi*_common.inc and config/sources/families/sun*.conf, no board is using an u-boot release newer than v2024.01.

How Has This Been Tested?

• Build image for Orange Pi Zero 3 board, flash device with 1.5GB DRAM and power on with serial cable: logs will show the right memory size
• Build image for Orange Pi Zero 3 board, flash device with 1.5GB DRAM and power on: board will boot normally

Well, it should be tested in all memory options (1GB/1.5GB/2GB/4GB), but I only have a spare 1.5GB one.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings