MHI Host

========

Core
----

- Removed the "mhi_poll()" API as there are no in-kernel users available at the
  moment.

- Added range check for the CHDBOFF and ERDBOFF registers in case the device
  reports bad values.

- Fixed the errno for the rest of the range checks to use -ERANGE.

- Modified the event ring handlers to ring the doorbell only if there are
  any pending elements in the ring to process for the device.

- Removed the check for EE (Execution Environment) while processing the SYS_ERR
  transition as it creates device recovery issues when SBL (Secondary
  Bootloader) crashes early.

- Used mhi_tryset_pm_state() API to set the error state instead of open coding
  if the firmware loading fails. This avoids the race with other pm_state
  updates.

pci_generic
-----------

- Dropped the dedundant pci_{enable/disable}_pcie_error_reporting() calls from
  driver probe's error path as the PCI core itself takes care of that now.

- Revered the commit 2d5253a096c6 ("bus: mhi: host: pci_generic: Add a secondary
  AT port to Telit FN990") as it turned out to be erroneous. This happened due
  to the patch adding secondary AT port for FN990 getting applied through NET
  and MHI trees and this caused two commits for the same functionality but one
  of them ended up wrong.

- Added support for Foxconn T99W510 modem based on SDX24 chipset from Qualcomm.

MHI Endpoint
============

- Demoted the channel not supported error log to debug as not all devices will
  support all channels defined in MHI spec and this may spam users.
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