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New PLL scheme on ELM/BAF.

v2: squash in pll fix.  Plls are part of the phys.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>