staging: rtl8188eu: clean up rtw_recv_entry

Change the return type to int, the function returns 0 or 1.
Remove the goto statement, we're not doing any cleanup on exit.
Summarize variable declarations and assignments.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210407170531.29356-6-martin@kaiser.cx


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