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 <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Takashi Iwai <[e-mail]>

sound/pci/asihpi/hpi6000.c

···
 	int local_count = count;
 	int xfer_size;
 	u32 *pdata = dest;
-	u32 loop_count = 0;
 
 	while (local_count) {
 		if (local_count > c6711_burst_size)
···
 		pdata += xfer_size;
 		local_hpi_address += sizeof(u32) * xfer_size;
 		local_count -= xfer_size;
-		loop_count++;
 	}
 
 	if (time_out)