target-mips: fix mft* helpers/call

This patch attempts to fix mft* helpers and the associated TCG calls.
mft* helpers do not take a register in argument, however:
- some helpers are called with an argument while they do not take one.
- some helpers are declared with an argument they don't use.

Acked-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5674 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/target-mips/op_helper.c b/target-mips/op_helper.c
index 9e9c425..3744728 100644
--- a/target-mips/op_helper.c
+++ b/target-mips/op_helper.c
@@ -1358,7 +1358,7 @@
 #endif /* !CONFIG_USER_ONLY */
 
 /* MIPS MT functions */
-target_ulong do_mftgpr(target_ulong t0, uint32_t sel)
+target_ulong do_mftgpr(uint32_t sel)
 {
     int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
 
@@ -1368,7 +1368,7 @@
         return env->tcs[other_tc].gpr[sel];
 }
 
-target_ulong do_mftlo(target_ulong t0, uint32_t sel)
+target_ulong do_mftlo(uint32_t sel)
 {
     int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
 
@@ -1378,7 +1378,7 @@
         return env->tcs[other_tc].LO[sel];
 }
 
-target_ulong do_mfthi(target_ulong t0, uint32_t sel)
+target_ulong do_mfthi(uint32_t sel)
 {
     int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
 
@@ -1388,7 +1388,7 @@
         return env->tcs[other_tc].HI[sel];
 }
 
-target_ulong do_mftacx(target_ulong t0, uint32_t sel)
+target_ulong do_mftacx(uint32_t sel)
 {
     int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);
 
@@ -1398,7 +1398,7 @@
         return env->tcs[other_tc].ACX[sel];
 }
 
-target_ulong do_mftdsp(target_ulong t0)
+target_ulong do_mftdsp(void)
 {
     int other_tc = env->CP0_VPEControl & (0xff << CP0VPECo_TargTC);