xfsdump: (style) remove spaces for pointers and negations

Another case of different xfsdump style, spaces around * and !
operators. This style was used a lot through xfsdump:
(* foo_t)xxx
  ^ space
While the rest of XFS omits the space. Same for negations:
if (! foo)

This patch changes all occurrences to comply with the rest of xfs/kernel
coding style by removing the space. Unlike the previous patches, this
one is not fully replicable by a script - I had to manually correct many
cases of overzealous replacements in comments or strings.
(Regular expressions are a too weak tool for these context-sensitive
changes.)

Still, the script that did most of the job is here:

find . -name '*.[ch]' ! -type d -exec gawk -i inplace '{
    $0 = gensub(/^([^"]*)\(\* /, "\\1(*", "g") # foo(* bar
    $0 = gensub(/\(\* ([^"]*)$/, "(*\\1", "g") #
    $0 = gensub(/^([^ *#]{2}[^"]*)! /, "\\1!", "g") # space after '!'
}; {print }' {} \;

Signed-off-by: Jan Tulak <jtulak@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>