board: 8974: Add support for virtual keys
board: 8974: Add support for virtual keys

Set up virtual keys based on coordinates while device is
initializing.

Change-Id: Ie728cefb8927a33f72d3f1054ac51674362e5c85
Signed-off-by: Amy Maloche <136dbe9eae95bbc401d4b86e6123e55b94e20cff@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas