TAKE - clean up log reads during mount/recovery

[Steve Lord <lord@sgi.com>]

In working on getting xfs to do only aligned I/O for EVMS we found
mount and recovery could still be non-aligned, this fixes it, or at
least fixes some cases, there may be more yet.

Date:  Tue Jul  9 13:03:38 PDT 2002
Workarea:  jen.americas.sgi.com:/src/lord/xfs-linux.2.4

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.x-xfs


Modid:  2.4.x-xfs:slinx:122727a
linux/fs/xfs/xfs_log_recover.c - 1.236
	- when allocating a buffer for recovery reading the log, use a power of 2