Fix Linux modules uninstall

A missing semicolon between kmoddir variable declaration and the
uninstall for loop caused modules_uninstall-Linux to fail with:

    Syntax error: "do" unexpected

Reviewed-by: Kjeld Schouten <kjeld@schouten-lebbing.nl>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Jacob Adams <jacob@tookmund.com>
Closes #11032

module/Makefile.in

@@ -96,7 +96,7 @@ modules_install: modules_install-@ac_system@
 
 modules_uninstall-Linux:
 	@# Uninstall the kernel modules
-	kmoddir=$(DESTDIR)$(INSTALL_MOD_PATH)/lib/modules/@LINUX_VERSION@ \
+	kmoddir=$(DESTDIR)$(INSTALL_MOD_PATH)/lib/modules/@LINUX_VERSION@; \
 	for objdir in $(ZFS_MODULES); do \
 		$(RM) -R $$kmoddir/$(INSTALL_MOD_DIR)/$$objdir; \
 	done