exynos5410: libcamera: get gralloc HAL
exynos5410: libcamera: lock gralloc buffers during setup
exynos5410: libcamera: send preview buffer to camera layer
exynos5410: libcamera: set preview buffer size
exynos5410: libcamera: fix buffer indexing
exynos5410: libcamera: remove unused mapping index
exynos5410: libcamera: process preview thread buffers