configure: disabled -mips64 option for loongson and remove redundant cpuflags

1.Option -march=loongson3a conflicts with -mips64 or -mips64r2.
2.Option -mhard-float has been removed.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -3937,7 +3937,6 @@ elif enabled mips; then
             enable fast_cmov
             enable fast_unaligned
             disable aligned_stack
-            cpuflags="-march=$cpu"
         ;;
         generic)
             disable mips32r5
@@ -4691,7 +4690,7 @@ elif enabled mips; then
     if enabled mips64 && (enabled mipsdspr1 || enabled mipsdspr2); then
         add_cflags "-mips64r2"
         add_asflags "-mips64r2"
-    elif enabled mips64 && enabled mipsfpu; then
+    elif enabled mips64 && enabled mipsfpu && disabled loongson3; then
         add_cflags "-mips64"
         add_asflags "-mips64"
     elif enabled mipsdspr1 || enabled mipsdspr2; then
@@ -4716,8 +4715,7 @@ elif enabled mips; then
      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
     enabled msa       && check_cflags "-mmsa" && check_ldflags "-mmsa" &&
      check_inline_asm msa       '"addvi.b $w0, $w1, 1"'
-    enabled loongson3 && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
-        check_inline_asm loongson3 '"gsldxc1 $f0, 0($2, $3)"'
+    enabled loongson3 && check_inline_asm loongson3 '"gsldxc1 $f0, 0($2, $3)"'
 
     enabled mips32r5 && add_asflags "-mips32r5 -mfp64"
     enabled mips64r6 && add_asflags "-mips64r6 -mfp64"