serial: ifx6x60: Free memory when probe fails
When spi_setup() fails it doesn't free ifx_dev and we have a memory leak. Fix this by freeing ifx_dev before the return. Signed-off-by: NSouptick joarder <jrdr.linux@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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