IB/ehca: Move extern declarations from .c files to .h files

Make sure declarations stay in sync with definitions by keeping all 
extern declarations in common .h files.
Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/ehca/ehca_classes.h

@@ -322,6 +322,7 @@ extern int ehca_static_rate;
 extern int ehca_port_act_time;
 extern int ehca_use_hp_mr;
 extern int ehca_scaling_code;
+extern int ehca_mr_largepage;
 
 struct ipzu_queue_resp {
 	u32 qe_size;      /* queue entry size */

drivers/infiniband/hw/ehca/ehca_mrmw.c

@@ -64,8 +64,6 @@ enum ehca_mr_pgsize {
 	EHCA_MR_PGSIZE16M = 0x1000000L
 };
 
-extern int ehca_mr_largepage;
-
 static u32 ehca_encode_hwpage_size(u32 pgsize)
 {
 	u32 idx = 0;

drivers/infiniband/hw/ehca/ehca_pd.c

@@ -88,7 +88,6 @@ int ehca_dealloc_pd(struct ib_pd *pd)
 	u32 cur_pid = current->tgid;
 	struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
 	int i, leftovers = 0;
-	extern struct kmem_cache *small_qp_cache;
 	struct ipz_small_queue_page *page, *tmp;
 
 	if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&

drivers/infiniband/hw/ehca/hcp_if.c

@@ -758,7 +758,6 @@ u64 hipz_h_register_rpage_mr(const struct ipz_adapter_handle adapter_handle,
 			     const u64 logical_address_of_page,
 			     const u64 count)
 {
-	extern int ehca_debug_level;
 	u64 ret;
 
 	if (unlikely(ehca_debug_level >= 2)) {

drivers/infiniband/hw/ehca/ipz_pt_fn.h

@@ -54,6 +54,8 @@
 struct ehca_pd;
 struct ipz_small_queue_page;
 
+extern struct kmem_cache *small_qp_cache;
+
 /* struct generic ehca page */
 struct ipz_page {
 	u8 entries[EHCA_PAGESIZE];