libcamera: Add missing <stdint.h> include to dma_buf_allocator.h

Without the change the build fails on upcoming `gcc-15` as:

    In file included from ../src/libcamera/dma_buf_allocator.cpp:9:
    ../include/libcamera/internal/dma_buf_allocator.h:66:19: error: 'uint64_t' has not been declared
       66 |         void sync(uint64_t step);
          |                   ^~~~~~~~

Signed-off-by: Sergei Trofimovich <slyich@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

0 files changed, 0 insertions, 0 deletions