rt2800pci: make Kconfig help entry more helpful

Document known issues with the driver to aid distribution makers,
users and developers in making informed decisions instead of wasting
their time needlessly.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: NGertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/Kconfig

@@ -64,7 +64,7 @@ config RT2800PCI_SOC
 	default y
 
 config RT2800PCI
-	tristate "Ralink rt2800 (PCI/PCMCIA) support"
+	tristate "Ralink rt2800 (PCI/PCMCIA) support (VERY EXPERIMENTAL)"
 	depends on (RT2800PCI_PCI || RT2800PCI_SOC) && EXPERIMENTAL
 	select RT2X00_LIB_PCI if RT2800PCI_PCI
 	select RT2X00_LIB_SOC if RT2800PCI_SOC
@@ -77,6 +77,9 @@ config RT2800PCI
 	  This adds support for rt2800 wireless chipset family.
 	  Supported chips: RT2760, RT2790, RT2860, RT2880, RT2890 & RT3052
 
+	  This driver is non-functional at the moment and is intended for
+	  developers.
+
 	  When compiled as a module, this driver will be called "rt2800pci.ko".
 
 config RT2500USB