staging: cxt1e1: Avoid using 0 instead of NULL
staging: cxt1e1: Avoid using 0 instead of NULL

Fixed the following sparse warnings:

drivers/staging/cxt1e1/hwprobe.c:162:38:
	warning: Using plain integer as NULL pointer
drivers/staging/cxt1e1/hwprobe.c:163:38:
	warning: Using plain integer as NULL pointer
drivers/staging/cxt1e1/hwprobe.c:179:46:
	warning: Using plain integer as NULL pointer
drivers/staging/cxt1e1/hwprobe.c:184:46:
	warning: Using plain integer as NULL pointer

Signed-off-by: Thomas Vegas <6ab3d061041c40dedb6ddcbc3ff47eb915ae08fc@safe-mail.net>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs