[S] Change in coreboot[master]: vendorcode/mediatek/mt8192: Fix set but unused variables

[Yu-Ping Wu (Code Review)]

Attention is currently required from: Xi Chen, Paul Menzel, Arthur Heymans.

Yu-Ping Wu has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74543 )

Change subject: vendorcode/mediatek/mt8192: Fix set but unused variables
......................................................................

Patch Set 5:

(4 comments)

File src/vendorcode/mediatek/mt8192/dramc/dramc_pi_basic_api.c:

https://review.coreboot.org/c/coreboot/+/74543/comment/280ff6f6_1f7c3d29 
PS5, Line 274: emi_set
I think this is used below.

https://review.coreboot.org/c/coreboot/+/74543/comment/26ec90ca_9137343b 
PS5, Line 305: #if (!__ETT__)//preloader
             : 	if(emi_setting_index == -1)
             : 		emi_set = &default_emi_setting;
             : 	else
             : 		emi_set = &emi_settings[emi_setting_index];
             : #else//ett
             : 	emi_set = &default_emi_setting;
             : #endif
             : 	(void)emi_set;
Can we remove all of these?

File src/vendorcode/mediatek/mt8192/include/x_hal_io.h:

https://review.coreboot.org/c/coreboot/+/74543/comment/0455c7ed_94ef155b 
PS5, Line 65: 	UINT16 upk = 1; \
Can we remove this variable?

https://review.coreboot.org/c/coreboot/+/74543/comment/c38aa8e3_19998992 
PS5, Line 65: 	UINT16 upk = 1; \
Can we remove this variable?