The pcim_iomap_region() function never returns NULL, it returns error
pointers. Update the checking to match.
Fixes: b91c13534a ("misc: cb710: Replace deprecated PCI functions")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/aQITFDPyuzjNN4GN@stanley.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>