spi: bcmbca-hsspi: Simplify clock handling with devm_clk_get_enabled()

spi: bcmbca-hsspi: Simplify clock handling with devm_clk_get_enabled()

Replace devm_clk_get() followed by clk_prepare_enable() with
devm_clk_get_enabled() for both the "hsspi" and "pll" clocks. This
reduces boilerplate code and error handling, as the managed API
automatically disables the clocks when the device is removed or if
probe fails.

Remove the now-unnecessary clk_disable_unprepare() calls from the
probe error paths and the remove callback. Simplify the error handling
by converting to direct returns with dev_err_probe() where appropriate.

Signed-off-by: Pei Xiao <xiaopei01@kylinos.cn>
Link: https://patch.msgid.link/a3d07ed20d7bdc676fb10c9a73224f80e83b3232.1773885292.git.xiaopei01@kylinos.cn
Signed-off-by: Mark Brown <broonie@kernel.org>