staging: r8188eu: remove unnecessary casting

The dhcpMessage struct member variable "cookie" is already declared
to be of type __be32. There is no need to cast it again as __be32.
Signed-off-by: Deepak R Varma <drv@mailo.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/c333e22349c5c347c740b425330b35830b969fa9.1667755987.git.drv@mailo.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_br_ext.c

@@ -615,7 +615,7 @@ void dhcp_flag_bcast(struct adapter *priv, struct sk_buff *skb)
 				if ((udph->source == htons(CLIENT_PORT)) &&
 				    (udph->dest == htons(SERVER_PORT))) { /*  DHCP request */
 					struct dhcpMessage *dhcph = (void *)udph + sizeof(struct udphdr);
-					u32 cookie = be32_to_cpu((__be32)dhcph->cookie);
+					u32 cookie = be32_to_cpu(dhcph->cookie);
 
 					if (cookie == DHCP_MAGIC) { /*  match magic word */
 						if (!(dhcph->flags & htons(BROADCAST_FLAG))) {