staging: rtl8723bs: hal: Modify comparison to constant in rtl8723bs_xmit.c

Modify comparison to true in file rtl8723bs_xmit in order to follow
kernel coding style of constant should appear on the right side.

Signed-off-by: Himadri Pandya <himadri18.07@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>