[AArch64] fix aarch64-gen build

[Szabolcs Nagy <szabolcs dot nagy at arm dot com>]

The generator table should not depend on symbols in aarch64-opc.c,
so make it possible to disable the verifiers via a VERIFIER macro.

This fixes the maintainer build that uses aarch64-gen.

opcodes/
2016-05-03  Szabolcs Nagy  <szabolcs.nagy@arm.com>

	* aarch64-gen.c (VERIFIER): Define.
	* aarch64-opc.c (VERIFIER): Define.
	(verify_ldpsw): Use static linkage.
	* aarch64-opc.h (verify_ldpsw): Remove.
	* aarch64-tbl.h: Use VERIFIER for verifiers.

diff --git a/opcodes/aarch64-gen.c b/opcodes/aarch64-gen.c
index c106c7d..ed0834a 100644
--- a/opcodes/aarch64-gen.c
+++ b/opcodes/aarch64-gen.c
@@ -28,6 +28,7 @@
 #include "getopt.h"
 #include "opcode/aarch64.h"
 
+#define VERIFIER(x) NULL
 #include "aarch64-tbl.h"
 
 static int debug = 0;
diff --git a/opcodes/aarch64-opc.c b/opcodes/aarch64-opc.c
index 8fbea46..d9a31e8 100644
--- a/opcodes/aarch64-opc.c
+++ b/opcodes/aarch64-opc.c
@@ -3420,7 +3420,7 @@ aarch64_sys_ins_reg_supported_p (const aarch64_feature_set features,
 #define BIT(INSN,BT)     (((INSN) >> (BT)) & 1)
 #define BITS(INSN,HI,LO) (((INSN) >> (LO)) & ((1 << (((HI) - (LO)) + 1)) - 1))
 
-bfd_boolean
+static bfd_boolean
 verify_ldpsw (const struct aarch64_opcode * opcode ATTRIBUTE_UNUSED,
 	      const aarch64_insn insn)
 {
@@ -3447,4 +3447,5 @@ verify_ldpsw (const struct aarch64_opcode * opcode ATTRIBUTE_UNUSED,
 
 /* Include the opcode description table as well as the operand description
    table.  */
+#define VERIFIER(x) verify_##x
 #include "aarch64-tbl.h"
diff --git a/opcodes/aarch64-opc.h b/opcodes/aarch64-opc.h
index c5bcbb8..08494c6 100644
--- a/opcodes/aarch64-opc.h
+++ b/opcodes/aarch64-opc.h
@@ -390,7 +390,4 @@ get_logsz (unsigned int size)
   return ls[size - 1];
 }
 
-/* Instruction Verifiers.  */
-extern bfd_boolean verify_ldpsw (const struct aarch64_opcode *, const aarch64_insn);
-
 #endif /* OPCODES_AARCH64_OPC_H */
diff --git a/opcodes/aarch64-tbl.h b/opcodes/aarch64-tbl.h
index 7a47a17..e72cc06 100644
--- a/opcodes/aarch64-tbl.h
+++ b/opcodes/aarch64-tbl.h
@@ -2383,13 +2383,13 @@ struct aarch64_opcode aarch64_opcode_table[] =
   CORE_INSN ("ldp", 0x29400000, 0x7ec00000, ldstpair_off, OP3 (Rt, Rt2, ADDR_SIMM7), QL_LDST_PAIR_R, F_SF),
   CORE_INSN ("stp", 0x2d000000, 0x3fc00000, ldstpair_off, OP3 (Ft, Ft2, ADDR_SIMM7), QL_LDST_PAIR_FP, 0),
   CORE_INSN ("ldp", 0x2d400000, 0x3fc00000, ldstpair_off, OP3 (Ft, Ft2, ADDR_SIMM7), QL_LDST_PAIR_FP, 0),
-  {"ldpsw", 0x69400000, 0xffc00000, ldstpair_off, 0, CORE, OP3 (Rt, Rt2, ADDR_SIMM7), QL_LDST_PAIR_X32, 0, verify_ldpsw},
+  {"ldpsw", 0x69400000, 0xffc00000, ldstpair_off, 0, CORE, OP3 (Rt, Rt2, ADDR_SIMM7), QL_LDST_PAIR_X32, 0, VERIFIER (ldpsw)},
   /* Load/store register pair (indexed).  */
   CORE_INSN ("stp", 0x28800000, 0x7ec00000, ldstpair_indexed, OP3 (Rt, Rt2, ADDR_SIMM7), QL_LDST_PAIR_R, F_SF),
   CORE_INSN ("ldp", 0x28c00000, 0x7ec00000, ldstpair_indexed, OP3 (Rt, Rt2, ADDR_SIMM7), QL_LDST_PAIR_R, F_SF),
   CORE_INSN ("stp", 0x2c800000, 0x3ec00000, ldstpair_indexed, OP3 (Ft, Ft2, ADDR_SIMM7), QL_LDST_PAIR_FP, 0),
   CORE_INSN ("ldp", 0x2cc00000, 0x3ec00000, ldstpair_indexed, OP3 (Ft, Ft2, ADDR_SIMM7), QL_LDST_PAIR_FP, 0),
-  {"ldpsw", 0x68c00000, 0xfec00000, ldstpair_indexed, 0, CORE, OP3 (Rt, Rt2, ADDR_SIMM7), QL_LDST_PAIR_X32, 0, verify_ldpsw},
+  {"ldpsw", 0x68c00000, 0xfec00000, ldstpair_indexed, 0, CORE, OP3 (Rt, Rt2, ADDR_SIMM7), QL_LDST_PAIR_X32, 0, VERIFIER (ldpsw)},
   /* Load register (literal).  */
   {"ldr",   0x18000000, 0xbf000000, loadlit, OP_LDR_LIT,   CORE, OP2 (Rt, ADDR_PCREL19),    QL_R_PCREL, F_GPRSIZE_IN_Q, NULL},
   {"ldr",   0x1c000000, 0x3f000000, loadlit, OP_LDRV_LIT,  CORE, OP2 (Ft, ADDR_PCREL19),    QL_FP_PCREL, 0, NULL},