[aarch64] Change two function declaration types

Commit r271514 missed changing the type of two functions in
aarch64-protos.h.  The function definitions had been updated to use
uint64_t while the function declarations had been missed.
They were missed since I only tested the patch on aarch64 where
`unsigned long` is the same as `uint64_t`.

This patch updates these declarations in aarch64-protos.h.

Tested by building an aarch64 cross-compiler on arm-none-linux-gnu (so
that `unsigned long` and `uint64_t` are different and would give error
messages), and bootstrapping on aarch64-none-linux-gnu.
Also manually tested command line options to see that
-march=armv8-a+typo prints out the expected flags while using the new
feature flags does not complain about missing flags.

gcc/ChangeLog:

2019-05-24  Matthew Malcomson  <matthew.malcomson@arm.com>

	PR target/90588
	* common/config/aarch64/aarch64-common.c
	(aarch64_rewrite_selected_cpu): Change local temporary variable
	type from unsigned long to uint64_t.
	* config/aarch64/aarch64-protos.h (aarch64_parse_extension,
	aarch64_get_extension_string_for_isa_flags): Change declaration to
	match new definition by replacing unsigned long with uint64_t.

From-SVN: r271599

gcc/ChangeLog

+2019-05-24  Matthew Malcomson  <matthew.malcomson@arm.com>
+
+	PR target/90588
+	* common/config/aarch64/aarch64-common.c
+	(aarch64_rewrite_selected_cpu): Change local temporary variable
+	type from unsigned long to uint64_t.
+	* config/aarch64/aarch64-protos.h (aarch64_parse_extension,
+	aarch64_get_extension_string_for_isa_flags): Change declaration to
+	match new definition by replacing unsigned long with uint64_t.
+
 2019-05-24  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/90568

gcc/common/config/aarch64/aarch64-common.c

@@ -541,7 +541,7 @@ aarch64_rewrite_selected_cpu (const char *name)
       || a_to_an->arch == aarch64_no_arch)
     fatal_error (input_location, "unknown value %qs for %<-mcpu%>", name);
 
-  unsigned long extensions = p_to_a->flags;
+  uint64_t extensions = p_to_a->flags;
   aarch64_parse_extension (extension_str.c_str (), &extensions, NULL);
 
   std::string outstr = a_to_an->arch_name

gcc/config/aarch64/aarch64-protos.h

@@ -624,11 +624,10 @@ bool aarch64_handle_option (struct gcc_options *, struct gcc_options *,
 			     const struct cl_decoded_option *, location_t);
 const char *aarch64_rewrite_selected_cpu (const char *name);
 enum aarch64_parse_opt_result aarch64_parse_extension (const char *,
-						       unsigned long *,
+						       uint64_t *,
 						       std::string *);
 void aarch64_get_all_extension_candidates (auto_vec<const char *> *candidates);
-std::string aarch64_get_extension_string_for_isa_flags (unsigned long,
-							unsigned long);
+std::string aarch64_get_extension_string_for_isa_flags (uint64_t, uint64_t);
 
 /* Defined in aarch64-d.c  */
 extern void aarch64_d_target_versions (void);