pinctrl: armada-37xx: Switch to use devm_kasprintf_strarray()
Since we have a generic helper, switch the module to use it. As a side effect, add check for the memory allocation failures and cleanup it either in error case or when driver is unloading. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Gregory CLEMENT <gregory.clement@bootlin.com>
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