ARC: [plat_arcfpga]->[plat_sim]

* Remove remanants of legacy ARC FPGA platforms (AA4, ML509...)
* Only nsim simulation platform is left, rename platform accordingly
* AA4 DT stuff is compatible with nsim for ARC700 so rename it too

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

arch/arc/boot/dts/Makefile

@@ -1,5 +1,5 @@
 # Built-in dtb
-builtindtb-y		:= angel4
+builtindtb-y		:= nsim_700
 
 ifneq ($(CONFIG_ARC_BUILTIN_DTB_NAME),"")
 	builtindtb-y	:= $(patsubst "%",%,$(CONFIG_ARC_BUILTIN_DTB_NAME))

arch/arc/boot/dts/nsim_700.dts

@@ -10,7 +10,7 @@
 /include/ "skeleton.dtsi"
 
 / {
-	compatible = "snps,arc-angel4";
+	compatible = "snps,nsim";
 	clock-frequency = <80000000>;	/* 80 MHZ */
 	#address-cells = <1>;
 	#size-cells = <1>;