fix spelling in hw sub directory

Correct obvious spelling errors in qemu/hw directory.

Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
diff --git a/hw/bt-hci-csr.c b/hw/bt-hci-csr.c
index 0dcf897..772b677 100644
--- a/hw/bt-hci-csr.c
+++ b/hw/bt-hci-csr.c
@@ -222,7 +222,7 @@
 
         rpkt = csrhci_out_packet_csr(s, H4_NEG_PKT, 10);
 
-        *rpkt ++ = 0x20;	/* Operational settings negotation Ok */
+        *rpkt ++ = 0x20;	/* Operational settings negotiation Ok */
         memcpy(rpkt, pkt, 7); rpkt += 7;
         *rpkt ++ = 0xff;
         *rpkt = 0xff;