coroipcc: proper path size in coroipcc_zcb_alloc

memory_map function internally limits maximum path size to
PATH_MAX but coroipcc_zcb_alloc passed smaller buffer.

Signed-off-by: Jan Friesse <jfriesse@redhat.com>
Reviewed-by: Steven Dake <sdake@redhat.com>

lib/coroipcc.c

@@ -1051,7 +1051,7 @@ coroipcc_zcb_alloc (
 {
 	struct ipc_instance *ipc_instance;
 	void *buf = NULL;
-	char path[128];
+	char path[PATH_MAX];
 	unsigned int res;
 	mar_req_coroipcc_zc_alloc_t req_coroipcc_zc_alloc;
 	coroipc_response_header_t res_coroipcs_zc_alloc;