Don't use pack() for structures that is used purely for software state.

Otherwise the resulting, unaligned mutex structure would trigger panic.

Submitted by:		Tom Cough <tom.couch lsi.com>
Reported/Tested by:	jhb
MFC after:		3 days

sys/dev/twa/tw_cl.h

@@ -74,7 +74,6 @@
 #define TW_CLI_PCI_CONFIG_STATUS_OFFSET		0x6 /* status register offset */
 #endif /* TW_OSL_PCI_CONFIG_ACCESSIBLE */
 
-#pragma pack(1)
 
 #ifdef TW_OSL_DEBUG
 struct tw_cli_q_stats {
@@ -206,7 +205,6 @@ struct tw_cli_ctlr_context {
 #endif /* TW_OSL_DEBUG */
 };
 
-#pragma pack()
 
 
 /*

sys/dev/twa/tw_cl_share.h

@@ -125,7 +125,6 @@
 #define TW_CL_SEVERITY_DEBUG_STRING	"DEBUG"
 
 
-#pragma pack(1)
 
 /*
  * Structure, a pointer to which is used as the controller handle in
@@ -190,6 +189,7 @@ struct tw_cl_req_packet {
 };
 
 
+#pragma pack(1)
 /*
  * Packet that describes an AEN/error generated by the controller,
  * Common Layer, or even the OS Layer.
@@ -206,6 +206,7 @@ struct tw_cl_event_packet {
 	TW_UINT32	event_src;
 	TW_UINT8	severity_str[20];
 };
+#pragma pack()
 
 
 /* Structure to link 2 adjacent elements in a list. */
@@ -215,6 +216,7 @@ struct tw_cl_link {
 };
 
 
+#pragma pack(1)
 /* Scatter/Gather list entry with 32 bit addresses. */
 struct tw_cl_sg_desc32 {
 	TW_UINT32	address;