Staging: csr: fix code indent coding style issues in csr_wifi_hip_signals.h

This is a patch that fixes up code indent coding style warnings
in the csr_wifi_hip_signals.h found by checkpatch.pl tool.

Signed-off-by: Sunhee Hwang <sunheehwang821@gmail.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>