staging: ks7010: Use __packed over __attribute__((packed))

This replaces uses of __attribute__((packed)) with __packed, which is
recommended to be used over the direct __attribute__.  This patch then
includes <linux/compiler.h> as necessary to use __packed.

Signed-off-by: Matthew Kilgore <mattkilgore12@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>