staging: ks7010: change cast from uint16_t to u16

Header size and event fields of header are declared
as __le16 and being casted using uint16_t in cpu_to_le16.
Change cast to use preferred u16.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>