Documentation: sysfs-bus-usb: s/CONFIG_PM_RUNTIME/CONFIG_PM/

PM_RUNTIME has been replaced with PM by commit 464ed18e ("PM:
Eliminate CONFIG_PM_RUNTIME") hence substitute the reference on
PM_RUNTIME with PM and re-arrange the text to 80 column break.
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/ABI/testing/sysfs-bus-usb

@@ -118,12 +118,12 @@ What:		/sys/bus/usb/devices/.../power/usb3_hardware_lpm
 Date:		June 2015
 Contact:	Kevin Strasser <kevin.strasser@linux.intel.com>
 Description:
-		If CONFIG_PM_RUNTIME is set and a USB 3.0 lpm-capable device is
-		plugged in to a xHCI host which supports link PM, it will check
-		if U1 and U2 exit latencies have been set in the BOS
-		descriptor; if the check is is passed and the host supports
-		USB3 hardware LPM, USB3 hardware LPM will be enabled for the
-		device and the USB device directory will contain a file named
+		If CONFIG_PM is set and a USB 3.0 lpm-capable device is plugged
+		in to a xHCI host which supports link PM, it will check if U1
+		and U2 exit latencies have been set in the BOS descriptor; if
+		the check is is passed and the host supports USB3 hardware LPM,
+		USB3 hardware LPM will be enabled for the device and the USB
+		device directory will contain a file named
 		power/usb3_hardware_lpm. The file holds a string value (enable
 		or disable) indicating whether or not USB3 hardware LPM is
 		enabled for the device.