staging: unisys: visorbus: remove channel_addr check in handle_command

Removed a check for physaddr=0 in handle_command() function in
visorchipset.c.

Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorbus/visorchipset.c

@@ -1593,9 +1593,6 @@ handle_command(struct controlvm_message inmsg, u64 channel_addr)
 
 	/* create parsing context if necessary */
 	local_addr = (inmsg.hdr.flags.test_message == 1);
-	if (channel_addr == 0)
-		return -EINVAL;
-
 	parm_addr = channel_addr + inmsg.hdr.payload_vm_offset;
 	parm_bytes = inmsg.hdr.payload_bytes;