prf.c: code and style cleanup

Some cleanups before further changes:

- Remove dead leftover from the "case 's'" code.

- Remove needless parents and casts.

- Remove "register" qualifier as it is ignored. The compiler knows
  better these days.

- Adjust tabs assuming standard 8-columns tab spacing.

- Make multi-line comments start with "/*" on a line of its own.

- Make the format string const to match  prototypes in other files.

- Declare boolean variable and parameters as bool.

Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
1 file changed