Patch merged into coreboot/master: 1ab41db drivers/i2c/at24rf08c/lenovo_serials.c: Use NULL over '0'

the following patch was just integrated into master:
commit 1ab41db0e32985842caf50ea11043e8bb4ecf592
Author: Edward O'Callaghan 
Date:   Fri Nov 28 03:31:42 2014 +1100

drivers/i2c/at24rf08c/lenovo_serials.c: Use NULL over '0'

Change-Id: I7d8922d1812814ea2ebd72aaf5b5e28dc592bfb3
    Signed-off-by: Edward O'Callaghan 
    Reviewed-on: http://review.coreboot.org/7590
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi 
    Reviewed-by: Paul Menzel

See http://review.coreboot.org/7590 for details.

-gerrit