drv: Use __func__ instead of __FILE__

... to avoid needing a basename() which is dropped from string.h
in musl.

Bug: b/328316038
Test: android build
Change-Id: Ib619b9c45a30ce69be30270fe7da0f13421179be
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/5352313
Commit-Queue: Dominik Behr <dbehr@chromium.org>
Auto-Submit: Jason Macnak <natsu@google.com>
Reviewed-by: Dominik Behr <dbehr@chromium.org>
Tested-by: Jason Macnak <natsu@google.com>
Reviewed-by: Dawn Han <dawnhan@google.com>
2 files changed