spi: propagate error code to the caller of acpi_spi_device_alloc()

Since acpi_spi_device_alloc() has been designed to return an error
pointer we may now properly propagate error codes to the caller of
it. It helps debugging a lot.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220709000709.35622-1-andriy.shevchenko@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>