vppinfra: autodetect default hugepage size

Change-Id: I5ff713ad0b254c74c5622e3b9425cca365b5ee97
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vppinfra/mem.h b/src/vppinfra/mem.h
index 04c26d2..813ff6c 100644
--- a/src/vppinfra/mem.h
+++ b/src/vppinfra/mem.h
@@ -390,6 +390,7 @@
 clib_error_t *clib_mem_vm_ext_alloc (clib_mem_vm_alloc_t * a);
 void clib_mem_vm_ext_free (clib_mem_vm_alloc_t * a);
 u64 clib_mem_vm_get_page_size (int fd);
+uword clib_mem_get_default_hugepage_size (void);
 int clib_mem_vm_get_log2_page_size (int fd);
 u64 *clib_mem_vm_get_paddr (void *mem, int log2_page_size, int n_pages);