ALSA: asihpi: remove unused loop_count variable

clang with W=1 reports
sound/pci/asihpi/hpi6000.c:1256:6: error: variable
  'loop_count' set but not used [-Werror,-Wunused-but-set-variable]
        u32 loop_count = 0;
            ^
This variable is not used so remove it.
Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20230326205712.1358918-1-trix@redhat.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/asihpi/hpi6000.c

@@ -1253,7 +1253,6 @@ static u16 hpi6000_dsp_block_read32(struct hpi_adapter_obj *pao,
 	int local_count = count;
 	int xfer_size;
 	u32 *pdata = dest;
-	u32 loop_count = 0;
 
 	while (local_count) {
 		if (local_count > c6711_burst_size)
@@ -1273,7 +1272,6 @@ static u16 hpi6000_dsp_block_read32(struct hpi_adapter_obj *pao,
 		pdata += xfer_size;
 		local_hpi_address += sizeof(u32) * xfer_size;
 		local_count -= xfer_size;
-		loop_count++;
 	}
 
 	if (time_out)