sh: use ioread32/iowrite32 and mapped_reg for mstp32

static int sh_clk_mstp32_enable(struct clk *clk)

{

	__raw_writel(__raw_readl(clk->enable_reg) & ~(1 << clk->enable_bit),

		     clk->enable_reg);

	iowrite32(ioread32(clk->mapped_reg) & ~(1 << clk->enable_bit),

		  clk->mapped_reg);

	return 0;

}

static void sh_clk_mstp32_disable(struct clk *clk)

{

	__raw_writel(__raw_readl(clk->enable_reg) | (1 << clk->enable_bit),

		     clk->enable_reg);

	iowrite32(ioread32(clk->mapped_reg) | (1 << clk->enable_bit),

		  clk->mapped_reg);

}

static struct clk_ops sh_clk_mstp32_clk_ops = {