selftests/alsa: Fix format specifier and function mismatch in mixer-test

In the ctl_value_index_valid() function, when validating 64-bit integer
controls (SND_CTL_ELEM_TYPE_INTEGER64), the error message for maximum
value validation has two bugs:

1. Uses snd_ctl_elem_info_get_max() instead of the 64-bit variant
   snd_ctl_elem_info_get_max64()
2. Uses %ld format specifier instead of %lld for long long type

This is inconsistent with the minimum value validation (line 335-339)
which correctly uses get_min64() and %lld. The mismatch can cause:
- Incorrect maximum values being reported on some architectures
- Undefined behavior due to format specifier mismatch
- Potential crashes when printing the error message

Fix by using snd_ctl_elem_info_get_max64() and %lld format specifier
to match the data type and be consistent with the minimum value check.

Signed-off-by: Malaya Kumar Rout <malayarout91@gmail.com>
Link: https://patch.msgid.link/20260705171038.171966-1-malayarout91@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

0 files changed, 0 insertions, 0 deletions