ALSA: hda: Remove unused MAX_PIN_CONFIGS constant

Since it was introduced around v2.6.30 it was never used. Also HDA
specification does not mention any limitation on number of PIN
configurations.

Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Link: https://lore.kernel.org/r/20220818141517.109280-4-amadeuszx.slawinski@linux.intel.com


Signed-off-by: Takashi Iwai <tiwai@suse.de>