Change in flashrom[master]: linux_mtd: Switch fopen() to open() for MTD devices

[Nico Huber (Code Review)]

Attention is currently required from: Douglas Anderson, Edward O'Callaghan, Angel Pons, Patrick Rudolph.
Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/50206 )

Change subject: linux_mtd: Switch fopen() to open() for MTD devices
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Patch Set 2:

(2 comments)

Commit Message:

https://review.coreboot.org/c/flashrom/+/50206/comment/a4a43916_8361f83e 
PS2, Line 26: overhead / translation that we just don't need.
Proof?

File linux_mtd.c:

https://review.coreboot.org/c/flashrom/+/50206/comment/f59485ad_1a049631 
PS2, Line 206: 		if (read(dev_fileno, buf + i, step) != step) {
AFAIR, read() can be interrupted and return a short count even if
everything is alright. Is that not true for MTD device files?

If it can't be interrupted, is that specified somewhere or
implementation specific?