bsp: qemu-virt64-riscv: Kconfig: remove duplicated RT_USING_VIRTIO

[unicornx]

Fixed #9669

There is problem in the Kconfig of qemu-virt64-riscv. RT_USING_VIRTIO is already defined in components/drivers/virtio/Kconfig, so it should not be defined again in the BSP kconfig.

The solution is to rename RT_USING_VIRTIO to BSP_USING_VIRTIO. Also, refer to the configuration method for virtio device drivers in bsp/qemu-virt64-aarch64/drivers/Kconfig to rewrite the configuration of BSP_USING_VIRTIO_xxx.

Updated default .config/rtconfig.h at the same time.

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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• 本拉取/合并请求是一个草稿版本 This PR is for a code-review and is intended to get feedback
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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
• 没有垃圾代码，代码尽量精简，不包含#if 0代码，不包含已经被注释了的代码 All redundant code is removed and cleaned up
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• 对难懂代码均提供对应的注释 I've commented appropriately where code is tricky
• 代码是高质量的 Code in this PR is of high quality
• 已经使用formatting 等源码格式化工具确保格式符合RT-Thread代码规范 This PR complies with RT-Thread code specification
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