m68k/nios2-semi: fix gettimeofday() result check

gettimeofday() returns 0 for success.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

target/m68k/m68k-semi.c

@@ -381,7 +381,7 @@ void do_m68k_semihosting(CPUM68KState *env, int nr)
             qemu_timeval tv;
             struct gdb_timeval *p;
             result = qemu_gettimeofday(&tv);
-            if (result != 0) {
+            if (result == 0) {
                 if (!(p = lock_user(VERIFY_WRITE,
                                     arg0, sizeof(struct gdb_timeval), 0))) {
                     /* FIXME - check error code? */

target/nios2/nios2-semi.c

@@ -403,7 +403,7 @@ void do_nios2_semihosting(CPUNios2State *env)
             qemu_timeval tv;
             struct gdb_timeval *p;
             result = qemu_gettimeofday(&tv);
-            if (result != 0) {
+            if (result == 0) {
                 p = lock_user(VERIFY_WRITE, arg0, sizeof(struct gdb_timeval),
                               0);
                 if (!p) {