[gcc r13-6449] s390: Use arch14 instead of z16 for -march=native.

[Robin Dapp <rdapp@gcc.gnu.org>]

https://gcc.gnu.org/g:da5adab2ae046bed0e2b72466f439f023f697433

commit r13-6449-gda5adab2ae046bed0e2b72466f439f023f697433
Author: Robin Dapp <rdapp@linux.ibm.com>
Date:   Wed Feb 1 19:39:10 2023 +0100

    s390: Use arch14 instead of z16 for -march=native.
    
    When compiling on a system where binutils do not yet support the 'z16'
    name assembling fails with -march=native on a z16 machine.
    Currently, this is interpreted as -march=z16.  This patch uses -march=arch14
    instead.
    
    gcc/ChangeLog:
    
            * config/s390/driver-native.cc (s390_host_detect_local_cpu): Use
            arch14 instead of z16.

Diff:
---
 gcc/config/s390/driver-native.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/config/s390/driver-native.cc b/gcc/config/s390/driver-native.cc
index 563da45c7f6..3b9c1e1ca5d 100644
--- a/gcc/config/s390/driver-native.cc
+++ b/gcc/config/s390/driver-native.cc
@@ -125,10 +125,10 @@ s390_host_detect_local_cpu (int argc, const char **argv)
 	      break;
 	    case 0x3931:
 	    case 0x3932:
-	      cpu = "z16";
+	      cpu = "arch14";
 	      break;
 	    default:
-	      cpu = "z16";
+	      cpu = "arch14";
 	      break;
 	    }
 	}