V4L/DVB (3344a): Conversions from kmalloc+memset to k(z|c)alloc


Conversions from kmalloc+memset to k(z|c)alloc.
Signed-off-by: NPanagiotis Issaris <takis@issaris.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>