exynos5410: libcamera: Add initial libcamera skeleton

* Initial skeleton for a version 1.0 camera API based camera HAL
exynos5410: libcamera: Add camera info struct
exynos5410: libcamera: add camera callback function
exynos5410: libcamera: add stubs for preview ops
exynos5410: libcamera: add internal ExynosCamera module
exynos5410: libcamera: add ISP initialization code
exynos5410: libcamera: fix include guards
exynos5410: libcamera: fix preview stub responses
exynos5410: libcamera: add basic preview functions