Add include files for prototypes

Include the header with prototypes in the file that provides definitions
as well, to catch any mismatch between prototype and definition.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10470

module/zfs/gzip.c

@@ -30,6 +30,7 @@
 #include <sys/types.h>
 #include <sys/strings.h>
 #include <sys/qat.h>
+#include <sys/zio_compress.h>
 
 #ifdef _KERNEL