staging: rtl8192e: Rename pPSC

Rename variable pPSC to psc to avoid CamelCase which is not accepted by
checkpatch.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/47ded8a906e55d6f09b51cd8f2dfb78b7b92c1cc.1668313325.git.philipp.g.hortmann@gmail.com


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