sh: Check return value of clk_get on ms7724

	/* set SPU2 clock to 83.4 MHz */

	clk = clk_get(NULL, "spu_clk");

	if (clk) {

		clk_set_rate(clk, clk_round_rate(clk, 83333333));

		clk_put(clk);

	}

	/* change parent of FSI A */

	clk = clk_get(NULL, "fsia_clk");

	if (clk) {

		clk_register(&fsimcka_clk);

		clk_set_parent(clk, &fsimcka_clk);

		clk_set_rate(clk, 11000);

		clk_set_rate(&fsimcka_clk, 11000);

		clk_put(clk);

	}

	/* SDHI0 connected to cn7 */

	gpio_request(GPIO_FN_SDHI0CD, NULL);