[L] Change in flashrom[master]: ch347_spi.c: Add initial support for the WCH CH347

[Nicholas Chin (Code Review)]

Attention is currently required from: Thomas Heijligen, Angel Pons, qianfan, Anastasia Klimchuk.

Nicholas Chin has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/70573 )

Change subject: ch347_spi.c: Add initial support for the WCH CH347
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Patch Set 3: -Code-Review

(2 comments)

File ch347_spi.c:

https://review.coreboot.org/c/flashrom/+/70573/comment/38767a47_b3a8114d 
PS3, Line 106: uint8_t *buffer = malloc(packet_len);
This isn't freed later. Maybe just use a statically allocated buffer with a fixed size.

https://review.coreboot.org/c/flashrom/+/70573/comment/9608c6df_78860b23 
PS3, Line 145: malloc(CH347_MAX_DATA_LEN + 3);
Same as above