staging: rtl8192e: Replace RF90_PATH_C in test expression of for loop

Replace RF90_PATH_C in test expression of the for loop with the variable
that is commonly used. This avoids false hits when searching for usage of
RF90_PATH_C and therefore improves readability.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/f9af7a3d3e608206a4aa4ba2bd377b9201111b3f.1678740713.git.philipp.g.hortmann@gmail.com


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