target/arm: Fix checkpatch space errors in helper.c

target/arm: Fix checkpatch space errors in helper.c

Fix the following:

ERROR: spaces required around that '|' (ctx:VxV)
ERROR: space required before the open parenthesis '('
ERROR: spaces required around that '+' (ctx:VxB)
ERROR: space prohibited between function name and open parenthesis '('

(the last two still have some occurrences in macros which I left
behind because it might impact readability)

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-id: 20221213190537.511-3-farosas@suse.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>