staging: rtl8723au: hal: Removed unnecessary braces.

This patch fixes "braces {} are not necessary for single statement
blocks" checkpatch.pl warning in hal_com.c

Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>