Use symbolic names for the values inside reg layout arrays. New register
names are added following the PCS register layout that is used by the
particular PHY.

Note: ipq8074 tables appear to use a mixture of v2 and v3 registers.
This might need additional fixes.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20221110192248.873973-12-dmitry.baryshkov@linaro.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>