wireless/p54: prepare for FIRMWARE_NAME_MAX removal

We're going to remove the FIRMWARE_NAME_MAX definition in order to avoid any
firmware name length restriction.
This patch gets rid of the statically allocated p54usb firmware string, and
replaces them with const char pointers.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/p54/p54usb.c

@@ -84,8 +84,8 @@ MODULE_DEVICE_TABLE(usb, p54u_table);
 static const struct {
 	u32 intf;
 	enum p54u_hw_type type;
-	char fw[FIRMWARE_NAME_MAX];
-	char fw_legacy[FIRMWARE_NAME_MAX];
+	const char *fw;
+	const char *fw_legacy;
 	char hw[20];
 } p54u_fwlist[__NUM_P54U_HWTYPES] = {
 	{