staging: greybus: firmware: Remove extra braces from single line if

Fixes checkpatch warning:
  braces {} are not necessary for any arm of this statement
Signed-off-by: Michael Sartain <mikesart@fastmail.com>
Acked-by: Viresh Kumar <viresh.kumar at linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/greybus/Documentation/firmware/firmware.c

@@ -217,13 +217,12 @@ int main(int argc, char *argv[])
 	if (argc > 2)
 		sscanf(argv[2], "%u", &fw_update_type);
 
-	if (argc > 3) {
+	if (argc > 3)
 		firmware_tag = argv[3];
-	} else if (!fw_update_type) {
+	else if (!fw_update_type)
 		firmware_tag = FW_TAG_INT_DEFAULT;
-	} else {
+	else
 		firmware_tag = FW_TAG_BCND_DEFAULT;
-	}
 
 	if (argc > 4)
 		sscanf(argv[4], "%u", &fw_timeout);