hwrng: omap3-rom - fix using wrong clk_disable() in omap_rom_rng_runtime_resume()

'ddata->clk' is enabled by clk_prepare_enable(), it should be disabled
by clk_disable_unprepare().

Fixes: 8d9d4bdc ("hwrng: omap3-rom - Use runtime PM instead of custom functions")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/omap3-rom-rng.c

@@ -92,7 +92,7 @@ static int __maybe_unused omap_rom_rng_runtime_resume(struct device *dev)
 
 	r = ddata->rom_rng_call(0, 0, RNG_GEN_PRNG_HW_INIT);
 	if (r != 0) {
-		clk_disable(ddata->clk);
+		clk_disable_unprepare(ddata->clk);
 		dev_err(dev, "HW init failed: %d\n", r);
 
 		return -EIO;