drm/amdkfd: change amdkfd version to 0.7.1

#define KFD_DRIVER_AUTHOR	"AMD Inc. and others"

#define KFD_DRIVER_DESC		"Standalone HSA driver for AMD's GPUs"

#define KFD_DRIVER_DATE		"20141113"

#define KFD_DRIVER_DATE		"20150122"

#define KFD_DRIVER_MAJOR	0

#define KFD_DRIVER_MINOR	7

#define KFD_DRIVER_PATCHLEVEL	0

#define KFD_DRIVER_PATCHLEVEL	1

const struct kfd2kgd_calls *kfd2kgd;

static const struct kgd2kfd_calls kgd2kfd = {