drivers/zorro: Add export.h to proc.c

To fix what used to be the implicit presence of the macros
EXPORT_SYMBOL and THIS_MODULE, via module.h being everywhere.

Signed-off-by: Paul Gortmaker <[e-mail]>

drivers/zorro/proc.c

···
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/init.h>
+#include <linux/export.h>
 #include <asm/uaccess.h>
 #include <asm/amigahw.h>
 #include <asm/setup.h>