ipack: ipoctal: remove unnecessary (void*) conversions

arg is a void * type and does not require a cast.
Signed-off-by: XU pengfei <xupengfei@nfschina.com>
Link: https://lore.kernel.org/r/20230110101613.4519-1-xupengfei@nfschina.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/ipack/devices/ipoctal.c

@@ -253,7 +253,7 @@ static void ipoctal_irq_channel(struct ipoctal_channel *channel)
 static irqreturn_t ipoctal_irq_handler(void *arg)
 {
 	unsigned int i;
-	struct ipoctal *ipoctal = (struct ipoctal *) arg;
+	struct ipoctal *ipoctal = arg;
 
 	/* Clear the IPack device interrupt */
 	readw(ipoctal->int_space + ACK_INT_REQ0);