staging: rtl8723au: No spaces at the start of a line

Prior to this commit, a large block of constants used to represent
an AES S-box table were indented with spaces in rtl8723au's
rtw_security.c. Correct the checkpatch.pl warnings indicating that
spaces should not be used to indent lines:
	WARNING: please, no spaces at the start of a line

Signed-off-by: M. Vefa Bicakci <m.v.b@runbox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>