[arm] Put CPU's FPU capabilities directly in the ISA specification

As part of the transition from the original support for named FPUs to
general FPU properties I defined an entry in the CPU definitions in
arm-cpus.in to use a named FPU.  However, that has now outlived its
usefulness and increasingly we are likely to find that newer cores do
not fit the legacy FPU names very well.  Furthermore it is now possible
to encode all the FPU capatilities directly in the ISA definitions, often
as simply as using +fp or +simd.

So this patch removes the fpu field from the "define cpu" entries and
instead encodes the same information in the isa field.  This also alows us
to remove a bit of now-dead code from parsecpu.awk.

	* config/arm/arm-cpus.in: Move information from fpu field of each
	cpu definition to the isa field.
	* config/arm/parsecpu.awk (fpu): Delete match rule.
	(gen_comm_data): Don't add bits from the CPU's FPU entry.

From-SVN: r262556

gcc/ChangeLog

+2018-07-11  Richard Earnshaw  <rearnsha@arm.com>
+
+	* config/arm/arm-cpus.in: Move information from fpu field of each
+	cpu definition to the isa field.
+	* config/arm/parsecpu.awk (fpu): Delete match rule.
+	(gen_comm_data): Don't add bits from the CPU's FPU entry.
+
 2018-07-11  Richard Biener  <rguenther@suse.de>
 
 	PR debug/86457

gcc/config/arm/parsecpu.awk

@@ -289,9 +289,6 @@ function gen_comm_data () {
 	    }
 	    all_isa_bits = all_isa_bits " " arch_opt_isa[feats[1],feats[m]]
 	}
-	if (cpus[n] in cpu_fpu) {
-	    all_isa_bits = all_isa_bits " " fpu_isa[cpu_fpu[cpus[n]]]
-	}
 	if (cpus[n] in cpu_isa) {
 	    all_isa_bits = all_isa_bits " " cpu_isa[cpus[n]]
 	}
@@ -662,13 +659,6 @@ BEGIN {
     parse_ok = 1
 }
 
-/^[ 	]*fpu / {
-    if (NF != 2) fatal("syntax: fpu <fpu-name>")
-    if (cpu_name == "") fatal("\"fpu\" outside of cpu block")
-    cpu_fpu[cpu_name] = $2
-    parse_ok = 1
-}
-
 /^[ 	]*isa / {
     if (NF < 2) fatal("syntax: isa <feature-or-fgroup> [<feature-or-fgroup>]*")
     flags=""