mei: move mei_cl_irq_write_complete to client.c

mei_cl_irq_write_complete operates on a client so move it
to client.c

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/misc/mei/client.c
Simple merge

diff --cc drivers/misc/mei/client.h
Simple merge

diff --cc drivers/misc/mei/interrupt.c
Simple merge