bsp/cvitek: print arch info. during boot-up

[unicornx]

Fixed #9909

Duo's CPU combination is more complicated:

BSP	B/L core	ISA	UART
cv18xx_risc-v	Big	RISC-V C906	UART0
c906-little	Littel	RISC-V C906	UART1
cv18xx_aarch64	Big	ARM Cortex A53	UART0

Printing ISA and big and small core information
during the boot process helps developers/testers
determine the CPU and serial port corresponding to the current console.

In addition, the RTT logo printing has already
distinguished whether it is smart, so the bsp
printing no longer distinguishes.

Updated README to sync with this change.

拉取/合并请求描述：(PR description)

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为什么提交这份PR (why to submit this PR)

你的解决方案是什么 (what is your solution)

请提供验证的bsp和config (provide the config and bsp)

• BSP:

• .config:

• action:

]

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我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following:

• 已经仔细查看过代码改动的对比 Already check the difference between PR and old code
• 代码风格正确，包括缩进空格，命名及其他风格 Style guide is adhered to, including spacing, naming and other styles
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