Merge branch 'xgene-fix-mod-crash-and-1g-hotplug'

Iyappan Subramanian says:

====================
drivers: net: xgene: Fix module crash and 1G hot-plug

This patchset addresses the following issues,

1. Fixes the kernel crash when the driver loaded as an kernel module
	- by fixing hardware cleanups and rearrange kernel API calls

2. Hot-plug issue on the SGMII 1G interface
	- by adding a driver for MDIO management

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Tested-by: Fushen Chen <fchen@apm.com>
Tested-by: Toan Le <toanle@apm.com>
---
v7: Address review comments from v6
	- fixed kbuild warnings
	- unmapped DMA memory on xgene_enet_delete_bufpool()
	- delete descriptor rings and buffer pools on cle_init() failure
	- fixed error deconstruction path on probe

v6: Address review comments from v5
	- changed to use devm_ioremap_resource
	- changed to return PTR_ERR(clk) on failure
	- cleaned up and removed indirections
	- exported mdio read/write and phy_register functions
	- changed mii_bus is to indicate interface instance
	- changed to call the exported mdio read/write and phy_register functions

v5: Address review comments from v4
	- Fixed clock reset sequence by adding delay
	- Fixed clock count by adding clk_unprepare_disable() in port shutdown

v4: Address review comments from v3
	- Reorganized into smaller patches
	- Added wrapper functions for sgmii_control_reset and sgmii_tbi_control_reset
	- Removed clk_get warning info
	- mdio: Changed the order of 'if' statements and removed the 'else' statement
	- mdio: Removed the mdio_read(write) indirection wrapper functions
	- ethtool: Fixed SGMII 1G get_settings and set_settings
	- Documentation: dtb: Added MDIO node information
	- MAINTAINERS: Added MDIO driver and documentation path

v3: Address review comments from v2
	- Add comment about hardware clock reset sequence on xgene_mdio_reset

v2: Address review comments from v1
	- Fixed patch 1 compilation error
	- Fixed mdio@1f610000 xge0clk reference
	- Squashed dtb patches
	- Added PORT_OFFSET macro

v1:
	- Initial version
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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