Staging: fbtft: fb_pcd8544: Fix warning line over 80 characters

This patch fixes the following checkpatch warning:

WARNING: line over 80 characters

Signed-off-by: Cláudio Maia <crrm@isep.ipp.pt>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>