mb/google/fizz: Determine PsysPl3 and Pl4 values

Pass in fizz-specific adapter-based PsysPl3 and Pl4 values to avoid
brownouts.  According to Intel doc #560604, page 74, the max time
window is 64ms (code=6) and the min duty cycle we can set is 4%.

TEST=Boot to OS and check MSRs using iotools for expected values

Change-Id: I06a4c5bc25f6ec036b79f6941f80e26058d64930
Signed-off-by: Shelley Chen <shchen@chromium.org>
Reviewed-on: https://review.coreboot.org/23528
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
1 file changed