arch/arm/bk7258: Beken BK7258 support + PSRAM driver + SysTick fix - #344

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yz471686525-eng wants to merge 7 commits into

open-vela:dev-ai-contest-2026from

yz471686525-eng:bk7258-psram

Commits on Aug 1, 2026

arch/arm/bk7258: add Beken BK7258 SoC support (NSH on CPU0/UART0)
yz471686525-eng
committed
8dbe907

Commits on Aug 13, 2026

arch/arm/bk7258: add PSRAM driver
yz471686525-eng
committed
1a6793a

Commits on Sep 18, 2026

arch/bk7258: add bk7258_psram_deinit() to power down PSRAM on exit
yz471686525-eng
committed
7a83921