[PATCH] m68knommu: fix warning: no previous prototype for 'init_dragen2'

[Greg Ungerer <gerg@xxxxxxxxxxxxxx>]

Fix the compile time warning:

    arch/m68k/68000/dragen2.c:38:13: warning: no previous prototype for 'init_dragen2' [-Wmissing-prototypes]
      38 | void __init init_dragen2(char *command, int size)
         |             ^~~~~~~~~~~~

There already exists a header file prototype, but that file was not
included in the dragen2.c code.

Signed-off-by: Greg Ungerer <gerg@xxxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
---
 arch/m68k/68000/dragen2.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/m68k/68000/dragen2.c b/arch/m68k/68000/dragen2.c
index 62f10a9e1ab7..1a57eff28cfe 100644
--- a/arch/m68k/68000/dragen2.c
+++ b/arch/m68k/68000/dragen2.c
@@ -11,6 +11,7 @@
 #include <linux/init.h>
 #include <asm/machdep.h>
 #include <asm/MC68VZ328.h>
+#include "m68328.h"
 #include "screen.h"
 
 /***************************************************************************/
-- 
2.25.1