This fixes the format string used to parse the major and minor
device fields in /proc/self/maps. These fields have hexadecimal
values and hence cannot be parsed as unsigned integers.

Fixes: 51480d05 ("implement free_bcc_memory() API (#2097)")
Reported-by: Nageswara R Sastry rnsastry@linux.vnet.ibm.com
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>