core: pager: fix arguments passed to calloc in alloc_merged_pgt_array()

An error was reported when compiling with GCC14 on this calloc:

core/arch/arm/mm/tee_pager.c: In function 'alloc_merged_pgt_array':
core/arch/arm/mm/tee_pager.c:934:35: warning: 'calloc' sizes specified
with 'sizeof' in the earlier argument and not in the later argument
[-Wcalloc-transposed-args]
   934 |         pgt_array = calloc(sizeof(struct pgt *), pgt_count);
       |                                   ^~~~~~

Looking at the code, it seems that pgt_count and sizeof(struct pgt *)
are inverted.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Fixes: 60e3671 ("core: pager fix alloc_merged_pgt_array()")
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>

core/arch/arm/mm/tee_pager.c

@@ -931,7 +931,7 @@ static struct pgt **alloc_merged_pgt_array(struct vm_paged_region *a,
 	    a->pgt_array[a_pgt_count - 1] != a_next->pgt_array[0])
 		return NULL;
 
-	pgt_array = calloc(sizeof(struct pgt *), pgt_count);
+	pgt_array = calloc(pgt_count, sizeof(struct pgt *));
 	if (!pgt_array)
 		return NULL;