PCI: rockchip: Clean up PHY if driver probe or resume fails

We observed that the clk_pciephy_ref is still enabled when we fail to probe
the driver.

  root@linaro-alip:~# grep pcie /sys/kernel/debug/clk/clk_summary
  clk_pciephy_ref                    1     1        24000000       0 0
  clk_pcie_pm                        0     0        24000000       0 0
	  clk_pcie_core_cru          0     0       125000000       0 0
	  clk_pciephy_ref100m        0     0       100000000       0 0
		  aclk_pcie          0     0       148500000       0 0
		  aclk_perf_pcie     0     0       148500000       0 0
			  pclk_pcie  0     0        37125000       0 0
  clk_pcie_core                      0     0               0       0 0

clk_pciephy_ref is used by the PHY driver and we need to properly disable
it for this case.  Add error handling in rockchip_pcie_init_port() and
rockchip_pcie_resume_noirq() to fix this issue.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>