staging: wilc1000: removed enums typedef for BEACON_IE & TX_RATE_T

This patch removed the unnecessary enum typedef for BEACON_IE &
TX_RATE_T
It fix "WARNING: do not add new typedefs" reported by checkpatch.pl

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>