staging: rtl8723bs: os_dep: Remove whitespace characters in code line

Remove four leading whitespace characters in code line.

Signed-off-by: R Veera Kumar <vkor@vkten.in>
Link: https://lore.kernel.org/r/27b60d20868203efdc5975803f5f9d43e46526dd.1584764104.git.vkor@vkten.in


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>