net: add driver for Synopsys Ethernet QoS device

This driver supports the Synopsys Designware Ethernet QoS (Quality of
Service) a/k/a eqos IP block, which is a different design than the HW
supported by the existing designware.c driver. The IP supports many
options for bus type, clocking/reset structure, and feature list. This
driver currently supports the specific configuration used in NVIDIA's
Tegra186 chip, but should be extensible to other combinations quite
easily, as explained in the source.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org> # V1
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

drivers/net/Kconfig

@@ -64,6 +64,17 @@ config ALTERA_TSE
 	  Please find details on the "Triple-Speed Ethernet MegaCore Function
 	  Resource Center" of Altera.
 
+config DWC_ETH_QOS
+	bool "Synopsys DWC Ethernet QOS device support"
+	depends on DM_ETH
+	select PHYLIB
+	help
+	  This driver supports the Synopsys Designware Ethernet QOS (Quality
+	  Of Service) IP block. The IP supports many options for bus type,
+	  clocking/reset structure, and feature list. This driver currently
+	  supports the specific configuration used in NVIDIA's Tegra186 chip,
+	  but should be extensible to other combinations quite easily.
+
 config E1000
 	bool "Intel PRO/1000 Gigabit Ethernet support"
 	help

drivers/net/Makefile

@@ -76,3 +76,4 @@ obj-$(CONFIG_FSL_MC_ENET) += ldpaa_eth/
 obj-$(CONFIG_FSL_MEMAC) += fm/memac_phy.o
 obj-$(CONFIG_VSC9953) += vsc9953.o
 obj-$(CONFIG_PIC32_ETH) += pic32_mdio.o pic32_eth.o
+obj-$(CONFIG_DWC_ETH_QOS) += dwc_eth_qos.o