[gcc r13-6320] aarch64: Update FLAGS field documentation comment in aarch64-cores.def

[Kyrylo Tkachov <ktkachov@gcc.gnu.org>]

https://gcc.gnu.org/g:b580721f034957f314fccf99ccc772c41b735039

commit r13-6320-gb580721f034957f314fccf99ccc772c41b735039
Author: Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Date:   Fri Feb 24 11:41:28 2023 +0000

    aarch64: Update FLAGS field documentation comment in aarch64-cores.def
    
    With the cleanup of the arch features in GCC 13 the comment on the FLAGS field in aarch64-cores.def
    is now outdated. It's now a comma-separated list rather than a bitwise or.
    Spotted while reviewing an aarch64-cores.def patch.
    Update the comment.
    
    gcc/ChangeLog:
    
            * config/aarch64/aarch64-cores.def (FLAGS): Update comment.

Diff:
---
 gcc/config/aarch64/aarch64-cores.def | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gcc/config/aarch64/aarch64-cores.def b/gcc/config/aarch64/aarch64-cores.def
index 85fdfd8bf74..2ec88c98400 100644
--- a/gcc/config/aarch64/aarch64-cores.def
+++ b/gcc/config/aarch64/aarch64-cores.def
@@ -29,7 +29,10 @@
    will be made, represented as an identifier.
    ARCH_IDENT is the architecture implemented by the chip as specified in
    aarch64-arches.def.
-   FLAGS are the bitwise-or of the traits that apply to that core.
+   FLAGS is a parentheses-enclosed, comma-separated list of architecture
+   features in the core that are present in addition to the base architecture.
+   The architecture feature names are as per the identifiers in
+   aarch64-option-extensions.def.
    This need not include flags implied by the architecture.
    COSTS is the name of the rtx_costs routine to use.
    IMP is the implementer ID of the CPU vendor.  On a GNU/Linux system it