drm-tests: refactor to internalized bs_map_info

This change updates to fill bs_map_info inside map func, and updates ptr
to map_ptr to store original mmap addr to be used for munmap.

BUG=b:282243659
TEST=emerge-$BOARD drm-tests

Change-Id: I9400af9fe071793560dd06d336544c7d678f6fd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/drm-tests/+/4530681
Commit-Queue: Yiwei Zhang <zzyiwei@chromium.org>
Tested-by: Yiwei Zhang <zzyiwei@chromium.org>
Reviewed-by: Dawn Han <dawnhan@google.com>
Reviewed-by: Andres Calderon Jaramillo <andrescj@chromium.org>
1 file changed