staging: rtl8723bs: use unaligned access macros in rtw_security.c

staging: rtl8723bs: use unaligned access macros in rtw_security.c

The driver defines custom functions secmicgetuint32() and
secmicputuint32() to handle little-endian byte-to-integer conversion.
This is redundant as the kernel provides optimized standard macros for
this purpose in <linux/unaligned.h>.

Replace the custom implementations with get_unaligned_le32() and
put_unaligned_le32() and delete the now-unused local functions.

Signed-off-by: Archit Anant <architanant5@gmail.com>
Reviewed-by: Ethan Tidmore <ethantidmore06@gmail.com>
Link: https://patch.msgid.link/20260130075113.34666-1-architanant5@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>