Staging: rtl8192e: Fix Sparse Warning for Static Declarations in rtllib_module.c

This patch fixes the following sparse warning in rtllib_module.c-

drivers/staging/rtl8192e/rtllib_module.c:240:12: warning: symbol 'rtllib_init' was not declared. Should it be static?
drivers/staging/rtl8192e/rtllib_module.c:260:13: warning: symbol 'rtllib_exit' was not declared. Should it be static?

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>