[L] Change in coreboot[main]: mb/asrock: Add Z87M Extreme4 (Haswell)

[Angel Pons (Code Review)]

Attention is currently required from: Jan Philipp Groß, Máté Kukri, Nicholas Chin.

Angel Pons has posted comments on this change by Jan Philipp Groß. ( https://review.coreboot.org/c/coreboot/+/85884?usp=email )

Change subject: mb/asrock: Add Z87M Extreme4 (Haswell)
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Patch Set 3: Code-Review+1

(3 comments)

File src/mainboard/asrock/z87m_extreme4/bootblock.c:

https://review.coreboot.org/c/coreboot/+/85884/comment/d41d8155_cc3ab98f?usp... :
PS3, Line 12: 
nit: drop one blank line

File src/mainboard/asrock/z87m_extreme4/dsdt.asl:

https://review.coreboot.org/c/coreboot/+/85884/comment/ff8dffa6_2b373bff?usp... :
PS3, Line 25: /* FIXME: remove this if the board doesn't have backlight. */
            : 		#include <drivers/intel/gma/acpi/default_brightness_levels.asl>
Yeet

File src/mainboard/asrock/z87m_extreme4/romstage.c:

https://review.coreboot.org/c/coreboot/+/85884/comment/4173836c_78681f24?usp... :
PS3, Line 11: /* FIXME: called after romstage_common, remove it if not used */
            : void mb_late_romstage_setup(void)
            : {
            : }
Yeet