[M] Change in flashrom[master]: flashrom: rewrite flashbuses_to_text()

[Alexander Goncharov (Code Review)]

Attention is currently required from: Felix Singer, Edward O'Callaghan, Angel Pons, Anastasia Klimchuk.

Alexander Goncharov has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/73039 )

Change subject: flashrom: rewrite flashbuses_to_text()
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Patch Set 5:

(1 comment)

File flashrom.c:

https://review.coreboot.org/c/flashrom/+/73039/comment/e66d9746_9e9ed568 
PS5, Line 948: if (bustype & (1 << i))
> why this condition is needed?

This condition checks if a specific bus is enabled (`bustype` is a bit flag variable). Instead of using constants from `enum chipbustype` (because we cannot do it in the loop), use the same bit shifting technique:

```
enum chipbustype {
    BUS_NONE	= 0,
    BUS_PARALLEL	= 1 << 0,
    BUS_LPC		= 1 << 1,
    BUS_FWH		= 1 << 2,
    BUS_SPI		= 1 << 3,
    BUS_PROG	= 1 << 4,
    BUS_NONSPI	= BUS_PARALLEL | BUS_LPC | BUS_FWH,
};
```