media: v4l2-core: 32 bit to 64 bit v4l2-compat changes

Along with data_offset, also copy the reserved and length
fields where applicable. Needed for running 32 bit app.

CRs-Fixed: 2384822
Change-Id: I074ead5bbcda84e7be4a9dd11d80d2dd8e8975c6
Signed-off-by: Shivendra Kakrania <shiven@codeaurora.org>
Signed-off-by: Chinmay Sawarkar <chinmays@codeaurora.org>