Pull EDAC updates from Borislav Petkov:

 - Support for ZynqMP DDR controller support to synopsys_edac along with
   a driver cleanup and generalization for the addition of support for
   the new IP. (Manish Narani)

 - Removal of the /sys/bus/edac devices hierarchy. This enabled us to
   get rid of the silly memory controllers maximum number notion. (Tony
   Luck and Borislav Petkov)

 - skx_edac improvements and fixes. (Qiuxu Zhuo and Tony Luck)

 - The usual garden variety of small cleanups and fixes.

* tag 'edac_for_4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: (25 commits)
  EDAC, fsl_ddr: Add LS1021A to the list of supported hardware
  EDAC, i5000: Remove set but not used local variables
  MAINTAINERS, EDAC: Drop bouncing email
  EDAC, i82975x: Fix spelling mistake "reserverd" -> "reserved"
  EDAC, fsl: Move error injection under CONFIG_EDAC_DEBUG
  EDAC, skx: Let EDAC core show the decoded result for debugfs
  EDAC, skx: Move debugfs node under EDAC's hierarchy
  EDAC, skx: Prepend hex formatting with '0x'
  EDAC, skx: Fix function calling order in skx_exit()
  EDAC: Drop per-memory controller buses
  EDAC: Don't add devices under /sys/bus/edac
  EDAC: Fix indentation issues in several EDAC drivers
  EDAC, skx: Fix randconfig builds in a better way
  EDAC, i82975x: Remove set but not used variable dtype
  EDAC, qcom_edac: Remove irq_handled local variable
  EDAC, synopsys: Add Error Injection support for ZynqMP DDR controller
  EDAC, synopsys: Add ECC support for ZynqMP DDR controller
  EDAC, synopsys: Add macro defines for ZynqMP DDRC
  dt: bindings: Document ZynqMP DDRC in Synopsys documentation
  EDAC, synopsys: Add error handling for the of_device_get_match_data() result
  ...