staging: rts5139: make the local variable static

Make the local variable (media_not_present and invalid_cmd_field) static

Fix the following sparse warnings in rts51x_transport.c

drivers/staging/rts5139/rts51x_transport.c:649:4: warning: symbol 'media_not_present' was not declared. Should it be static?
drivers/staging/rts5139/rts51x_transport.c:651:4: warning: symbol 'invalid_cmd_field' was not declared. Should it be static?

Signed-off-by: Ana Rey <anarey@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>

drivers/staging/rts5139/rts51x_transport.c

@@ -646,9 +646,9 @@ int rts51x_get_epc_status(struct rts51x_chip *chip, u16 *status)
 				    chip->usb->intr_urb->actual_length);
 }
 
-u8 media_not_present[] = {
+static u8 media_not_present[] = {
 	0x70, 0, 0x02, 0, 0, 0, 0, 10, 0, 0, 0, 0, 0x3A, 0, 0, 0, 0, 0 };
-u8 invalid_cmd_field[] = {
+static u8 invalid_cmd_field[] = {
 	0x70, 0, 0x05, 0, 0, 0, 0, 10, 0, 0, 0, 0, 0x24, 0, 0, 0, 0, 0 };
 
 void rts51x_invoke_transport(struct scsi_cmnd *srb, struct rts51x_chip *chip)