ACPI: thinkpad-acpi: minor hotkey_radio_sw fixes

Fixes some minor points in the radio switch code and docs.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index 91f688c..606af16 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -306,7 +306,7 @@
 		The recommended polling frequency is 10Hz.
 
 	hotkey_radio_sw:
-		if the ThinkPad has a hardware radio switch, this
+		If the ThinkPad has a hardware radio switch, this
 		attribute will read 0 if the switch is in the "radios
 		disabled" position, and 1 if the switch is in the
 		"radios enabled" position.