Change in flashrom[master]: tests: add init_shutdown test for realtek_mst_i2c_spi

[Peter Marheine (Code Review)]

Attention is currently required from: Nico Huber, Edward O'Callaghan, Angel Pons, Anastasia Klimchuk.
Peter Marheine has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/56911 )

Change subject: tests: add init_shutdown test for realtek_mst_i2c_spi
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Patch Set 3:

(5 comments)

File tests/init_shutdown.c:

https://review.coreboot.org/c/flashrom/+/56911/comment/7f1bc964_1fec5f60 
PS2, Line 307: 0x10ec
> This number has some meaning, also I see it is used in other mocks, so surely it is important. […]

Done

https://review.coreboot.org/c/flashrom/+/56911/comment/faebd0d3_189b299f 
PS2, Line 319: printf("ioctl(0x10ec, I2C_SLAVE, %#lx)\n", addr);
> This looks like a debugging statement, not sure we need it. […]

Done

https://review.coreboot.org/c/flashrom/+/56911/comment/f4196069_4fe656d8 
PS2, Line 320: 0x4a
> This number also needs a comment

Done

https://review.coreboot.org/c/flashrom/+/56911/comment/eb310661_16dda928 
PS2, Line 341: printf("i2c set register address %#x\n", bytes_buf[0]);
             : 		return 1;
> If you remove printf statements, this looks like one error path which returns -1 and one normal path […]

Done

https://review.coreboot.org/c/flashrom/+/56911/comment/dec2c946_ca5ee94e 
PS2, Line 365: T
> typo

Done