Add transaction.c to the jbd2 Makefile and update includes to use the
ext4l compatibility layer.
Add stubs for various functions needed by transaction.c including
atomic_add_return, prepare_to_wait_exclusive, rwsem_acquire_read,
hrtimer functions, and JBD2 trace stubs.
Remove JBD2 transaction function stubs that are now provided by
transaction.c.
Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
5c428be137