pinctrl: at91: Don't mix non-devm calls with devm ones

Replace devm_clk_get() by devm_clk_get_enabled() and drop
unneeded code pieces. This will make sure we keep the ordering
of the resource allocation correct.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Tested-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230215134242.37618-3-andriy.shevchenko@linux.intel.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>