V4L/DVB (3243): add firmware instructions for nxt2002 and nxt2004

- add firmware instructions for nxt2002 and nxt2004
Signed-off-by: Michael Krufky <mkrufky@m1k.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>

drivers/media/dvb/frontends/Kconfig

@@ -173,6 +173,11 @@ config DVB_NXT2002
 	help
 	  An ATSC 8VSB tuner module. Say Y when you want to support this frontend.
 
+	  This driver needs external firmware. Please use the command
+	  "<kerneldir>/Documentation/dvb/get_dvb_firmware nxt2002" to
+	  download/extract it, and then copy it to /usr/lib/hotplug/firmware
+	  or /lib/firmware (depending on configuration of firmware hotplug).
+
 config DVB_NXT200X
 	tristate "Nextwave NXT2002/NXT2004 based"
 	depends on DVB_CORE
@@ -181,6 +186,12 @@ config DVB_NXT200X
 	  An ATSC 8VSB and QAM64/256 tuner module. Say Y when you want
 	  to support this frontend.
 
+	  This driver needs external firmware. Please use the commands
+	  "<kerneldir>/Documentation/dvb/get_dvb_firmware nxt2002" and
+	  "<kerneldir>/Documentation/dvb/get_dvb_firmware nxt2004" to
+	  download/extract them, and then copy them to /usr/lib/hotplug/firmware
+	  or /lib/firmware (depending on configuration of firmware hotplug).
+
 config DVB_OR51211
 	tristate "or51211 based (pcHDTV HD2000 card)"
 	depends on DVB_CORE