memory: ti-aemif: use devm_clk_get_enabled() and shrink the code

Remove several lines of code and a jump label by using the managed
variant of clk_get() that also prepares and enables the clock (and
disables and unprepares it on driver detach).

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20240809-ti-aemif-v1-2-27b1e5001390@linaro.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>