spi: atcspi200: Use helper function devm_clk_get_enabled()

spi: atcspi200: Use helper function devm_clk_get_enabled()

Since commit 7ef9651e9792 ("clk: Provide new devm_clk helpers for prepared
and enabled clocks"), devm_clk_get() and clk_prepare_enable() can now be
replaced by devm_clk_get_enabled(). Moreover, it is no longer necessary to
unprepare and disable the clocks explicitly.

Signed-off-by: Pei Xiao <xiaopei01@kylinos.cn>
Link: https://patch.msgid.link/e53aefc63e28caf32bcd553f3d0a8f2a5a25cd8d.1773193726.git.xiaopei01@kylinos.cn
Signed-off-by: Mark Brown <broonie@kernel.org>