phy: HiSilicon: Fix copy and paste bug in error handling

This should check ">pmctrl" instead of "->sysctrl". This bug could
potentially lead to a crash if we dereference the error pointer.

Fixes: 73075011ffff ("phy: HiSilicon: Add driver for Kirin 970 PCIe PHY")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/20211117074843.GE5237@kili
Signed-off-by: Vinod Koul <vkoul@kernel.org>

phy: HiSilicon: Add driver for Kirin 970 PCIe PHY

The Kirin 970 PHY is somewhat similar to the Kirin 960, but it
does a lot more. Add the needed bits for PCIe to start working on
HiKey 970 boards.

Co-developed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/b7a4ff41b57d861b003f1a00cae81f3d226fbe18.1632814194.git.mchehab+huawei@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>