Change in coreboot[master]: soc/mediatek/mt8195: Utilize the retry macro

[Julius Werner (Code Review)]

Attention is currently required from: Hung-Te Lin, Rex-BC Chen, Jitao Shi, Yu-Ping Wu.
Julius Werner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55779 )

Change subject: soc/mediatek/mt8195: Utilize the retry macro
......................................................................

Patch Set 8: Code-Review+2

(1 comment)

File src/soc/mediatek/mt8195/dptx.c:

https://review.coreboot.org/c/coreboot/+/55779/comment/f712d151_f70dc2b3 
PS5, Line 186: 	if (cb_retry(7, dptx_hal_auxread_bytes(mtk_dp, cmd, dpcd_addr, length, data),
> I think retry is more like original code flow.

Well... I'd  prefer if we wrote code based on knowing how and why it works and not just on blindly copying stuff from elsewhere. But okay, no big deal.