ALSA: hda/ca0132: Fix using plain integer as NULL pointer in add_tuning_control

The 'add_tuning_control' function initializes two pointers using the
integer 0 instead of the NULL pointer, triggering sparse warnings.
Replaced both instaces of '0' with 'NULL' to resolve the type mismatch
and suppress the sparse warnings.

Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Lucy Thrun <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>

Author: 4liceD

sound/pci/hda/patch_ca0132.c

@@ -4385,8 +4385,8 @@ static int add_tuning_control(struct hda_codec *codec,
 
 	knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
 			SNDRV_CTL_ELEM_ACCESS_TLV_READ;
-	knew.tlv.c = 0;
-	knew.tlv.p = 0;
+	knew.tlv.c = NULL;
+	knew.tlv.p = NULL;
 	switch (pnid) {
 	case VOICE_FOCUS:
 		knew.info = voice_focus_ctl_info;