wifi: qtnfmac: remove braces around single statement blocks

Remove braces around single statement blocks in order to improve
readability. Also, an extra blank line was removed. Both warnings are
reported by checkpatch.pl

Signed-off-by: Sebin Sebastian <mailmesebin00@gmail.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220802045305.235684-1-mailmesebin00@gmail.com