[M] Change in flashrom[main]: ch347_spi: Add spi clock frequency selection

[ZhiYuanNJ (Code Review)]

Attention is currently required from: Anastasia Klimchuk, Nicholas Chin.

ZhiYuanNJ has posted comments on this change by ZhiYuanNJ. ( https://review.coreboot.org/c/flashrom/+/82776?usp=email )

Change subject: ch347_spi: Add spi clock frequency selection
......................................................................

Patch Set 10:

(1 comment)

File ch347_spi.c:

https://review.coreboot.org/c/flashrom/+/82776/comment/1031cf2a_2b91c089?usp... :
PS7, Line 365: 30MHz
> I'd have to do a bit of digging as I don't know of a quick way to find this. […]

If it is a Windows system, you can read it through the hardware ID of the device manager hardware details, for example: "USB\VID_1A86&PID_55DE&REV_0101&MI_04
", then the hardware version is v1.1. If it is Linux, you may need to write a small program to get bcdUSB.
like:

```c
#include <stdio.h>
#include <stdlib.h>
#include <usb.h>

int main() {
    struct usb_bus *bus;
    struct usb_device *dev;
    usb_init();
    usb_find_busses();
    usb_find_devices();

for(bus = usb_get_busses(); bus; bus = bus->next) {
        for(dev = bus->devices; dev; dev = dev->next) {
            printf("Device: %04x:%04x, bcdUSB: %04x\n",
                dev->descriptor.idVendor,
                dev->descriptor.idProduct,
                dev->descriptor.bcdUSB);
        }
    }
    return 0;
}
```