hwrng: nomadik - Change clk_disable to clk_disable_unprepare

hwrng: nomadik - Change clk_disable to clk_disable_unprepare

BugLink: https://bugs.launchpad.net/bugs/1969110
[ Upstream commit 7f0f1f3ef62ed7a40e30aff28115bd94c4211d1d ]

The corresponding API for clk_prepare_enable is clk_disable_unprepare,
other than clk_disable_unprepare.

Fix this by changing clk_disable to clk_disable_unprepare.

Fixes: beca35d05cc2 ("hwrng: nomadik - use clk_prepare_enable()")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 41887c82e76f891dc3677a2a642fe15d03b7af9b)
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>