binfmt/elf: Fix the minor style issue

and remove the unused macros and unnecessary cast

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

binfmt/libnxflat/libnxflat.h

@@ -25,11 +25,6 @@
  * Included Files
  ****************************************************************************/
 
-#include <nuttx/config.h>
-
-#include <sys/types.h>
-
-#include <nuttx/arch.h>
 #include <nuttx/binfmt/nxflat.h>
 
 /****************************************************************************
@@ -37,9 +32,24 @@
  ****************************************************************************/
 
 /****************************************************************************
- * Public Types
+ * Public Function Definitions
  ****************************************************************************/
 
+/****************************************************************************
+ * Name: nxflat_verifyheader
+ *
+ * Description:
+ *   Given the header from a possible NXFLAT executable, verify that it is
+ *   an NXFLAT executable.
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int nxflat_verifyheader(FAR const struct nxflat_hdr_s *header);
+
 /****************************************************************************
  * Name: nxflat_addrenv_alloc
  *

binfmt/libnxflat/libnxflat_init.c

@@ -36,6 +36,8 @@
 #include <nuttx/fs/fs.h>
 #include <nuttx/binfmt/nxflat.h>
 
+#include "libnxflat.h"
+
 /****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/