pgsql: Don't use bits32 in table AM interface

Don't use bits32 in table AM interface

Seems there's near-universal dislike for the bitsXX typedefs.
Revert that part of commit 1bd6f22f43ac in favor of using plain uint32.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/349bd8820215528adbd79a31796d205e148734f6

Modified Files
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src/backend/access/heap/heapam.c         |  8 ++++----
src/backend/access/heap/heapam_handler.c |  4 ++--
src/include/access/heapam.h              |  4 ++--
src/include/access/tableam.h             | 16 ++++++++--------
4 files changed, 16 insertions(+), 16 deletions(-)