hikey: gralloc: Change to allow gralloc_priv.h to be shared

Change how we include files, so that other projects can
inlcude the gralloc_priv.h file here.

Change-Id: I07537e2b4794595d3c2e0a0b150bad1ab9d63ca8
Signed-off-by: John Stultz <john.stultz@linaro.org>
1 file changed