staging: rtl8192u: Add or remove blank lines as required

This patch fixes the file r8190_rtl8256.c to avoid the following
checkpatch.pl warnings:
	CHECK: Blank lines aren't necessary before a close brace '}'
	CHECK: Please use a blank line after function/struct/union/enum declarations
	CHECK: Please don't use multiple blank line

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Link: https://lore.kernel.org/r/20190826182227.30738-1-sylphrenadin@gmail.com


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