xhci: workaround CSS timeout on AMD SNPS 3.0 xHC

xhci: workaround CSS timeout on AMD SNPS 3.0 xHC

BugLink: https://bugs.launchpad.net/bugs/1806838
Occasionally AMD SNPS 3.0 xHC does not respond to
CSS when set, also it does not flag anything on SRE and HCE
to point the internal xHC errors on USBSTS register. This stalls
the entire system wide suspend and there is no point in stalling
just because of xHC CSS is not responding.

To work around this problem, if the xHC does not flag
anything on SRE and HCE, we can skip the CSS
timeout and allow the system to continue the suspend. Once the
system resume happens we can internally reset the controller
using XHCI_RESET_ON_RESUME quirk

Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Sandeep Singh <Sandeep.Singh@amd.com>
cc: Nehal Shah <Nehal-bakulchandra.Shah@amd.com>
Cc: <stable@vger.kernel.org>
Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
(backported from commit b5282b66f0dfe6e76644c5195ec6aa3de15fefa3 git://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git for-usb-linus)
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Khalid Elmously <khalid.elmously@canonical.com>
Acked-by: Andy Whitcroft <andy.whitcroft@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>