arc: [plat-nsimosci*] use ezchip network driver

Since ezchip network driver was adapted to little endian architecture
this patch provides the corresponding arch/arc/{boot/dts,configs}/ updates so
we can switch over to this device-model/driver for OSCI platform.

Cc: Alexey Brodkin <[e-mail]>
Signed-off-by: Lada Trimasova <[e-mail]>
Signed-off-by: Vineet Gupta <[e-mail]>

arch/arc/boot/dts/nsimosci.dts

···
 		};
 
 		eth0: ethernet@f0003000 {
-			compatible = "snps,oscilan";
+			compatible = "ezchip,nps-mgt-enet";
 			reg = <0xf0003000 0x44>;
-			interrupts = <7>, <8>;
-			interrupt-names = "rx", "tx";
+			interrupts = <7>;
 		};
 	};
 };

arch/arc/boot/dts/nsimosci_hs.dts

···
 		};
 
 		eth0: ethernet@f0003000 {
-			compatible = "snps,oscilan";
+			compatible = "ezchip,nps-mgt-enet";
 			reg = <0xf0003000 0x44>;
-			interrupts = <25>, <26>;
-			interrupt-names = "rx", "tx";
+			interrupts = <25>;
 		};
 
 		arcpct0: pct {

arch/arc/boot/dts/nsimosci_hs_idu.dts

···
 		};
 
 		eth0: ethernet@f0003000 {
-			compatible = "snps,oscilan";
+			compatible = "ezchip,nps-mgt-enet";
 			reg = <0xf0003000 0x44>;
 			interrupt-parent = <&idu_intc>;
-			interrupts = <1 2>, <2 2>;
-			interrupt-names = "rx", "tx";
+			interrupts = <1 2>;
 		};
 
 		arcpct0: pct {

arch/arc/configs/nsimosci_defconfig

···
 # CONFIG_FIRMWARE_IN_KERNEL is not set
 # CONFIG_BLK_DEV is not set
 CONFIG_NETDEVICES=y
+CONFIG_EZCHIP_NPS_MANAGEMENT_ENET=y
 # CONFIG_INPUT_MOUSEDEV is not set
 CONFIG_INPUT_EVDEV=y
 # CONFIG_MOUSE_PS2_ALPS is not set

arch/arc/configs/nsimosci_hs_defconfig

···
 # CONFIG_FIRMWARE_IN_KERNEL is not set
 # CONFIG_BLK_DEV is not set
 CONFIG_NETDEVICES=y
+CONFIG_EZCHIP_NPS_MANAGEMENT_ENET=y
 CONFIG_INPUT_EVDEV=y
 # CONFIG_MOUSE_PS2_ALPS is not set
 # CONFIG_MOUSE_PS2_LOGIPS2PP is not set

arch/arc/configs/nsimosci_hs_smp_defconfig

···
 CONFIG_ARC_PLAT_SIM=y
 CONFIG_ISA_ARCV2=y
 CONFIG_SMP=y
+# CONFIG_ARC_HAS_GFRC is not set
 CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci_hs_idu"
 CONFIG_PREEMPT=y
 # CONFIG_COMPACTION is not set
···
 # CONFIG_NET_VENDOR_ARC is not set
 # CONFIG_NET_CADENCE is not set
 # CONFIG_NET_VENDOR_BROADCOM is not set
+CONFIG_EZCHIP_NPS_MANAGEMENT_ENET=y
 # CONFIG_NET_VENDOR_INTEL is not set
 # CONFIG_NET_VENDOR_MARVELL is not set
 # CONFIG_NET_VENDOR_MICREL is not set