Staging: quickstart: fixed coding style issues

Fixed the Following coding Style Issues:
drivers/staging/quickstart/quickstart.c:8: ERROR: trailing whitespace
drivers/staging/quickstart/quickstart.c:144: ERROR: spaces required around that '?' (ctx:VxV)
drivers/staging/quickstart/quickstart.c:144: ERROR: spaces required around that ':' (ctx:VxV)
Signed-off-by: NTimo von Holtz <tvh@informatik.uni-kiel.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/quickstart/quickstart.c

@@ -141,7 +141,8 @@ static ssize_t pressed_button_show(struct device *dev,
 					char *buf)
 {
 	return snprintf(buf, PAGE_SIZE, "%s\n",
-		(quickstart_data.pressed?quickstart_data.pressed->name:"none"));
+			(quickstart_data.pressed ?
+			 quickstart_data.pressed->name : "none"));
 }