after commit 5e248c2, kernel module build is broken

[Michael Butler]

Building 
/usr/obj/usr/src/amd64.amd64/sys/VM01-new/modules/usr/src/sys/modules/vmm/machine
machine -> /usr/src/sys/amd64/include
Building 
/usr/obj/usr/src/amd64.amd64/sys/VM01-new/modules/usr/src/sys/modules/vmm/x86
x86 -> /usr/src/sys/x86/include
Building 
/usr/obj/usr/src/amd64.amd64/sys/VM01-new/modules/usr/src/sys/modules/vmm/i386
i386 -> /usr/src/sys/i386/include
Building 
/usr/obj/usr/src/amd64.amd64/sys/VM01-new/modules/usr/src/sys/modules/vmm/opt_acpi.h
Building 
/usr/obj/usr/src/amd64.amd64/sys/VM01-new/modules/usr/src/sys/modules/vmm/opt_ddb.h
Building /usr/obj/usr/src/amd64.amd64/sys/VM01-new/cc.o
/usr/src/sys/netinet/cc/cc.c:475:10: error: 6 enumeration values not 
handled in switch: 'CC_ACK', 'CC_DUPACK', 'CC_PARTIALACK'... 
[-Werror,-Wswitch]
  475 |         switch (type) {
      |                 ^~~~
1 error generated.
*** [cc.o] Error code 1