[S] Change in flashrom[master]: serial.c: support BAUD rates > 230400 on macOS

[Name of user not set (Code Review)]

Attention is currently required from: Felix Singer, Name of user not set #1004601.

Hello build bot (Jenkins), Angel Pons,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/flashrom/+/67822

to look at the new patch set (#3).

Change subject: serial.c: support BAUD rates > 230400 on macOS
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serial.c: support BAUD rates > 230400 on macOS

use the apple way like demonstrated in the IOSerialTestLib.c
example code to set BAUD rates > 230400 on macOS.

Signed-off-by: Denis Ahrens 
Change-Id: I9c67048b9c7bc704d9b0c4ef4771f708fdb3e0f3
---
M serial.c
1 file changed, 35 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/22/67822/3