staging: unisys: visorbus: Remove pointer cast that causes sparse warning

Removes unnecessary cast of to __iomem of a non-io-mapped pointer, thereby
eliminating the following sparse warning:

visorchannel.c:159:17: warning: cast adds address space to expression (<asn:2>)
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorbus/visorbus_private.h

@@ -81,5 +81,5 @@ u64 visorchannel_get_clientpartition(struct visorchannel *channel);
 int visorchannel_set_clientpartition(struct visorchannel *channel,
 				     u64 partition_handle);
 char *visorchannel_uuid_id(uuid_le *guid, char *s);
-void __iomem *visorchannel_get_header(struct visorchannel *channel);
+void *visorchannel_get_header(struct visorchannel *channel);
 #endif

drivers/staging/unisys/visorbus/visorchannel.c

@@ -153,10 +153,10 @@ visorchannel_write(struct visorchannel *channel, ulong offset,
 	return 0;
 }
 
-void __iomem  *
+void *
 visorchannel_get_header(struct visorchannel *channel)
 {
-	return (void __iomem *)&channel->chan_hdr;
+	return &channel->chan_hdr;
 }
 
 /*