hwrng: cctrng - Add missing clk_disable_unprepare in cctrng_resume

BugLink: https://bugs.launchpad.net/bugs/2089340

commit 4b7acc85de14ee8a2236f54445dc635d47eceac0 upstream.

Add the missing clk_disable_unprepare() before return in
cctrng_resume().

Fixes: a583ed310b ("hwrng: cctrng - introduce Arm CryptoCell driver")
Cc: <stable@vger.kernel.org>
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

drivers/char/hw_random/cctrng.c

@@ -622,6 +622,7 @@ static int __maybe_unused cctrng_resume(struct device *dev)
 	/* wait for Cryptocell reset completion */
 	if (!cctrng_wait_for_reset_completion(drvdata)) {
 		dev_err(dev, "Cryptocell reset not completed");
+		clk_disable_unprepare(drvdata->clk);
 		return -EBUSY;
 	}