[ALSA] emu10k1 - Fix over-sized kmalloc for TLV

Reported by Al Viro:
In copy_tlv(), the size of kmalloc is wrongly calculated.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@perex.cz>

sound/pci/emu10k1/emufx.c

@@ -665,7 +665,7 @@ static unsigned int *copy_tlv(const unsigned int __user *_tlv)
 		return NULL;
 	if (data[1] >= MAX_TLV_SIZE)
 		return NULL;
-	tlv = kmalloc(data[1] * 4 + sizeof(data), GFP_KERNEL);
+	tlv = kmalloc(data[1] + sizeof(data), GFP_KERNEL);
 	if (!tlv)
 		return NULL;
 	memcpy(tlv, data, sizeof(data));