usb: misc: sisusbvga: compress return logic into one line

Simplify return logic to avoid unnecessary variable declaration
and assignment.

These issues were detected using Coccinelle and the following
semantic patch:

@@
local idexpression ret;
expression e;
@@

-ret =
+return
     e;
-return ret;

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/misc/sisusbvga/sisusb.c

@@ -610,13 +610,11 @@ static int sisusb_write_memio_byte(struct sisusb_usb_data *sisusb, int type,
 		u32 addr, u8 data)
 {
 	struct sisusb_packet packet;
-	int ret;
 
 	packet.header  = (1 << (addr & 3)) | (type << 6);
 	packet.address = addr & ~3;
 	packet.data    = data << ((addr & 3) << 3);
-	ret = sisusb_send_packet(sisusb, 10, &packet);
-	return ret;
+	return sisusb_send_packet(sisusb, 10, &packet);
 }
 
 static int sisusb_write_memio_word(struct sisusb_usb_data *sisusb, int type,
@@ -1333,13 +1331,11 @@ static int sisusb_write_pci_config(struct sisusb_usb_data *sisusb,
 		int regnum, u32 data)
 {
 	struct sisusb_packet packet;
-	int ret;
 
 	packet.header = 0x008f;
 	packet.address = regnum | 0x10000;
 	packet.data = data;
-	ret = sisusb_send_packet(sisusb, 10, &packet);
-	return ret;
+	return sisusb_send_packet(sisusb, 10, &packet);
 }
 
 static int sisusb_read_pci_config(struct sisusb_usb_data *sisusb,
@@ -2982,14 +2978,11 @@ err_out:
 static long sisusb_compat_ioctl(struct file *f, unsigned int cmd,
 		unsigned long arg)
 {
-	long retval;
-
 	switch (cmd) {
 	case SISUSB_GET_CONFIG_SIZE:
 	case SISUSB_GET_CONFIG:
 	case SISUSB_COMMAND:
-		retval = sisusb_ioctl(f, cmd, arg);
-		return retval;
+		return sisusb_ioctl(f, cmd, arg);
 
 	default:
 		return -ENOIOCTLCMD;