drm_hwcomposer: libdrmgetter: fix RGB565 format translation

FOSS graphic components (gbm_gralloc, mesa3d) are translating
HAL_PIXEL_FORMAT_RGB_565 to DRM_FORMAT_RGB565 without swapping
the R and B components. Same must be done here.

Fixes wrong colors in some games (i.e. Pixel Wheels).

Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
1 job for fix-libdrm-rgb565-format in 23 seconds