zdev: Add missing includes
zdev: Add missing includes

The header exit_code.h is required for the exit_code_t type and
the header misc.h for the err_t type.

Signed-off-by: Jens Remus <9647a37a176c11c7fb6887065f43509d6f3a5d2d@linux.ibm.com>
Signed-off-by: Jan Höppner <96138615ab4af0813785fa10d283f3d37eca3b78@linux.ibm.com>

ibm-s390-tools/s390-tools,ibm-s390-tools/s390-tools,ibm-s390-tools/s390-tools,ibm-s390-tools/s390-tools