mb/google/{brya,hades}: use soc index for variant_update_power_limits()

The power_limits_config variable for ADL/RPL is array data, but we got
soc_power_limits_config variable without its index. So correct the
code to get the proper pointer of the data for current CPU SKU.

I tried to override the PL4 value to 80W from 114W with following
table in ramstage.c as a test for bug b/328729536.
```
const struct cpu_power_limits limits[] = {
    {PCI_DID_INTEL_RPL_P_ID3, 15, 6000, 15000, 55000, 55000, 80000},
}
```

And then verified the msr_pl4 value on ChromeOS using Intel PTAT tool.
- Before this patch: msr_pl4 was not changed, it's always 114
- After this patch: msr_pl4 was changed to 80

BUG=None
BRANCH=None
TEST=Built and tested the function could adjust PL4 on xol in local.

Change-Id: I9f1ba25c2d673fda48babf773208c2f2d2386c53
Signed-off-by: Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81436
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Reviewed-by: Eric Lai <ericllai@google.com>

0 files changed, 0 insertions, 0 deletions