[gdb/doc] Don't advertise *&function for pascal and modula-2

In the docs I read [1]:
...
Address locations indicate a specific program address.  They have the
generalized form *address.

  ...

funcaddr

    An address of a function or procedure derived from its name.
    ...
    In Pascal and Modula-2, this is &function.
...

I tried "break *&function" for Pascal and Modula-2, and this doesn't work,
while "break *function" works fine.

Fix this by updating the documentation to reflect actual behaviour.

Approved-By: Eli Zaretskii <eliz@gnu.org>

PR gdb/32754
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=32754

[1] https://sourceware.org/gdb/current/onlinedocs/gdb.html/Address-Locations.html
1 file changed