[coreboot-gerrit] Change in coreboot[master]: soc/mediatek/mt8192: Do dramc command bus training

[Angel Pons (Code Review)]

Attention is currently required from: Xi Chen, Paul Menzel, CK HU, Yu-Ping Wu, Yidi Lin.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/44716 )

Change subject: soc/mediatek/mt8192: Do dramc command bus training
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Patch Set 56:

(1 comment)

File src/soc/mediatek/mt8192/dramc_pi_calibration_api.c:

https://review.coreboot.org/c/coreboot/+/44716/comment/f2eff1fe_00baf7fa 
PS42, Line 629: 0xF0000000U
> Please define constants for these 2 numbers: 0xF0000000U and 0x0FFFFFFFU.

If anything, I'd write these as `(0xf << 28)` and `~(0xf << 28)` respectively