Fix warnings while compiling with CONFIG_VIDEO enabled:
diu.c: In function 'video_hw_init':
diu.c:158: warning: 'return' with no value, in function returning non-void
diu.c:162: warning: format '%ld' expects type 'long int', but argument 6 has type 'int'
diu.c:162: warning: format '%ld' expects type 'long int', but argument 7 has type 'int'
Signed-off-by: Anatolij Gustschin <agust@denx.de>