There is no need to call devm_phy_get() if ACPI is used, so skip it.  The
host->generic_phy pointer should already be NULL due to the kzalloc(), so
no need to set it NULL again.

While at it, also remove the comment that has no relationship with
devm_phy_get().

Link: https://lore.kernel.org/r/20220504084212.11605-3-manivannan.sadhasivam@linaro.orgReviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Andrew Halaney <ahalaney@redhat.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>