kselftest/alsa - mixer-test: Fix the print format specifier warning

The GCC 13.2.0 compiler issued the following warning:

mixer-test.c: In function ‘ctl_value_index_valid’:
mixer-test.c:322:79: warning: format ‘%lld’ expects argument of type ‘long long int’, \
			      but argument 5 has type ‘long int’ [-Wformat=]
  322 |                         ksft_print_msg("%s.%d value %lld more than maximum %lld\n",
      |                                                                            ~~~^
      |                                                                               |
      |                                                                               long long int
      |                                                                            %ld
  323 |                                        ctl->name, index, int64_val,
  324 |                                        snd_ctl_elem_info_get_max(ctl->info));
      |                                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                        |
      |                                        long int

Fixing the format specifier as advised by the compiler suggestion removes the
warning.

Fixes: 3f48b13 ("kselftest: alsa: Factor out check that values meet constraints")
Cc: Mark Brown <broonie@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: linux-sound@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20240107173704.937824-3-mirsad.todorovac@alu.unizg.hr
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Author: Mirsad Todorovac

tools/testing/selftests/alsa/mixer-test.c

@@ -319,7 +319,7 @@ static bool ctl_value_index_valid(struct ctl_data *ctl,
 		}
 
 		if (int64_val > snd_ctl_elem_info_get_max64(ctl->info)) {
-			ksft_print_msg("%s.%d value %lld more than maximum %lld\n",
+			ksft_print_msg("%s.%d value %lld more than maximum %ld\n",
 				       ctl->name, index, int64_val,
 				       snd_ctl_elem_info_get_max(ctl->info));
 			return false;