staging: rdma: amso1100: Prefer using BIT Macro

Replace bit shifting on 1 with the BIT(x) Macro

The semantic patch used to find this is:
@@ int g; @@

-(1 << g)
+BIT(g)
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rdma/amso1100/c2_provider.c

@@ -372,7 +372,7 @@ static struct ib_mr *c2_reg_phys_mr(struct ib_pd *ib_pd,
 
 		total_len += buffer_list[i].size;
 		pbl_depth += ALIGN(buffer_list[i].size,
-				   (1 << page_shift)) >> page_shift;
+				   BIT(page_shift)) >> page_shift;
 	}
 
 	page_list = vmalloc(sizeof(u64) * pbl_depth);
@@ -387,7 +387,7 @@ static struct ib_mr *c2_reg_phys_mr(struct ib_pd *ib_pd,
 		int naddrs;
 
  		naddrs = ALIGN(buffer_list[i].size,
-			       (1 << page_shift)) >> page_shift;
+			       BIT(page_shift)) >> page_shift;
 		for (k = 0; k < naddrs; k++)
 			page_list[j++] = (buffer_list[i].addr +
 						     (k << page_shift));
@@ -408,7 +408,7 @@ static struct ib_mr *c2_reg_phys_mr(struct ib_pd *ib_pd,
 	       	(unsigned long long) page_list[0],
 	       	(unsigned long long) page_list[pbl_depth-1]);
   	err = c2_nsmr_register_phys_kern(to_c2dev(ib_pd->device), page_list,
- 					 (1 << page_shift), pbl_depth,
+					 BIT(page_shift), pbl_depth,
 					 total_len, 0, iova_start,
 					 c2_convert_access(acc), mr);
 	vfree(page_list);