Use the right booleans

TRUE and FALSE happen to be defined, but we should use B_TRUE and
B_FALSE for the sake of consistency.

Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Ryan Moeller <ryan@ixsystems.com>
Closes #9264

tests/zfs-tests/cmd/libzfs_input_check/libzfs_input_check.c

@@ -862,11 +862,11 @@ enum zfs_ioc_ref {
 boolean_t
 validate_ioc_values(void)
 {
-	boolean_t result = TRUE;
+	boolean_t result = B_TRUE;
 
 #define	CHECK(expr) do { \
 	if (!(expr)) { \
-		result = FALSE; \
+		result = B_FALSE; \
 		fprintf(stderr, "(%s) === FALSE\n", #expr); \
 	} \
 } while (0)