clk: shmobile: mstp: Fix the is_enabled() operation

The MSTP[SC]R registers have clock stop bits, not clock enable bits. The
bit value should thus be inverted in the is_enabled() operation.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

drivers/clk/shmobile/clk-mstp.c

@@ -112,7 +112,7 @@ static int cpg_mstp_clock_is_enabled(struct clk_hw *hw)
 	else
 		value = clk_readl(group->smstpcr);
 
-	return !!(value & BIT(clock->bit_index));
+	return !(value & BIT(clock->bit_index));
 }
 
 static const struct clk_ops cpg_mstp_clock_ops = {