ALSA: hda/ca0132: minor fix for allocation size

Although the "dma_chan" pointer occupies more or equal space compared
to "*dma_chan", the allocation size should use the size of variable
itself.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 01ef7db ("ALSA: hda - Update CA0132 codec to load DSP firmware binary")
Signed-off-by: Alexey V. Vissarionov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>

Author: Alexey V. Vissarionov

sound/pci/hda/patch_ca0132.c

@@ -2455,7 +2455,7 @@ static int dspio_set_uint_param(struct hda_codec *codec, int mod_id,
 static int dspio_alloc_dma_chan(struct hda_codec *codec, unsigned int *dma_chan)
 {
 	int status = 0;
-	unsigned int size = sizeof(dma_chan);
+	unsigned int size = sizeof(*dma_chan);
 
 	codec_dbg(codec, "     dspio_alloc_dma_chan() -- begin\n");
 	status = dspio_scp(codec, MASTERCONTROL, 0x20,