bcm5974: Add pointer and buttonpad properties
bcm5974: Add pointer and buttonpad properties

To simplify detection as a touchpad, inform userspace of the physical
properties of the device.

Signed-off-by: Chase Douglas <69e02ec421aa70a149511825d897f2549ceee9a2@canonical.com>
[b7088a9c70345a9ab94cacab3cc3888d0a7dc884@euromail.se: conflict resolution]
Signed-off-by: Henrik Rydberg <b7088a9c70345a9ab94cacab3cc3888d0a7dc884@euromail.se>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs