[RESEND v2 0/5] PCI: imx6: refine codes and add compliance tests mode support

This series patches refine pci-imx6 driver and do the following changes.
- Encapsulate the clock enable into one standalone function
- Add the error propagation from host_init
- Balance the usage of the regulator and clocks when link never came up
- Add the compliance tests mode support

Main changes from v1 to v2:
Regarding Lucas' comments.
  - Move the placement of the new imx6_pcie_clk_enable() to avoid the
    forward declarition.
  - Seperate the second patch of v1 patch-set to three patches.
  - Use the module_param to replace the kernel command line.
Regarding Bjorn's comments:
  - Use the cover-letter for a multi-patch series.
  - Correct the subject line, and refine the commit logs. For example,
    remove the timestamp of the logs.

drivers/pci/controller/dwc/pci-imx6.c | 166 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--------------------------------------
1 file changed, 105 insertions(+), 61 deletions(-)

[RESEND v2 1/5] PCI: imx6: Encapsulate the clock enable into one
[RESEND v2 2/5] PCI: imx6: Add the error propagation from host_init
[RESEND v2 3/5] PCI: imx6: Fix the regulator dump when link never
[RESEND v2 4/5] PCI: imx6: Fix the clock reference handling unbalance
[RESEND v2 5/5] PCI: imx6: Add the compliance tests mode support