pci: pci_alloc_bus(): use xzalloc() instead of kzalloc()
Also drop redundant xzalloc() result check
as xzalloc() does not return in case of memory allocation error.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>