Revert "MIPS: Use N64 by default for mips*64*-*-linux-gnuabi64"

This reverts commit d49f2dd78b.  It was
applied unapproved.

gas/configure

@@ -12280,7 +12280,7 @@ _ACEOF
 	esac
 	# Decide which ABI to target by default.
 	case ${target} in
-	  mips64*-openbsd* | mips*64*-linux-gnuabi64)
+	  mips64*-openbsd* | mips64*-linux-gnuabi64)
 	    mips_default_abi=N64_ABI
 	    ;;
 	  mips64*-linux* | mips-sgi-irix6* | mips64*-freebsd* \

gas/configure.ac

@@ -399,7 +399,7 @@ changequote([,])dnl
 	esac
 	# Decide which ABI to target by default.
 	case ${target} in
-	  mips64*-openbsd* | mips*64*-linux-gnuabi64)
+	  mips64*-openbsd* | mips64*-linux-gnuabi64)
 	    mips_default_abi=N64_ABI
 	    ;;
 	  mips64*-linux* | mips-sgi-irix6* | mips64*-freebsd* \

ld/configure.tgt

@@ -592,7 +592,7 @@ mips*-*-vxworks*)	targ_emul=elf32ebmipvxworks
 			;;
 mips*-*-windiss)	targ_emul=elf32mipswindiss
 			;;
-mips*64*el-*-linux-gnuabi64)
+mips64*el-*-linux-gnuabi64)
 			targ_emul=elf64ltsmip
 			targ_extra_emuls="elf64btsmip elf32ltsmipn32 elf32btsmipn32 elf32ltsmip elf32btsmip"
 			targ_extra_libpath=$targ_extra_emuls
@@ -601,7 +601,7 @@ mips64*el-*-linux-*)	targ_emul=elf32ltsmipn32
 			targ_extra_emuls="elf32btsmipn32 elf32ltsmip elf32btsmip elf64ltsmip elf64btsmip"
 			targ_extra_libpath=$targ_extra_emuls
 			;;
-mips*64*-*-linux-gnuabi64)
+mips64*-*-linux-gnuabi64)
 			targ_emul=elf64btsmip
 			targ_extra_emuls="elf64ltsmip elf32btsmipn32 elf32ltsmipn32 elf32btsmip elf32ltsmip"
 			targ_extra_libpath=$targ_extra_emuls

ld/testsuite/config/default.exp

@@ -177,16 +177,11 @@ if {! [info exists env(CCC_OVERRIDE_OPTIONS)]} {
 # installed, but to the O32 ABI in the build tree, because of some
 # specs-file hacks.  Make sure we use an ABI that is compatible with
 # the one we expect.
-# mips*64*-*linux-gnuabi64 compiler defaults to N64 ABI.
-if {([istarget mips64*-*-linux*] || [istarget mips*64*-*-linux-gnuabi64]) &&
+if {[istarget mips64*-*-linux*] &&
     (![board_info [target_info name] exists multilib_flags] ||
      ![string match "*-mabi" [board_info [target_info name] multilib_flags]])
    } {
-    if { [istarget *-*-gnuabi64] } {
-      append gcc_B_opt " -mabi=64"
-    } else {
-      append gcc_B_opt " -mabi=n32"
-    }
+    append gcc_B_opt " -mabi=n32"
 }
 
 if { [istarget rx-*-*] } {