Change in coreboot[master]: nb/intel/haswell: Program Mini-HD EM4 and EM5 registers

[Angel Pons (Code Review)]

Attention is currently required from: Patrick Rudolph.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/50143 )

Change subject: nb/intel/haswell: Program Mini-HD EM4 and EM5 registers
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Patch Set 3:

(1 comment)

File src/northbridge/intel/haswell/minihd.c:

https://review.coreboot.org/c/coreboot/+/50143/comment/08f5a692_77b66fc6 
PS3, Line 67: /* Mini-HD configuration */
            : 	reg32 = read32(base + 0x100c);
            : 	reg32 &= 0xfffc0000;
            : 	reg32 |= 0x4;
            : 	write32(base + 0x100c, reg32);
            : 
            : 	reg32 = read32(base + 0x1010);
            : 	reg32 &= 0xfffc0000;
            : 	reg32 |= 0x4b;
            : 	write32(base + 0x1010, reg32);
Looks like this programs the EM4/EM5 registers with fixed values. Given that Broadwell code also has this, I'd prefer to look into removing this once the code is deduplicated.