doesn't compile on 4.4.0-21-generic

Teh broadcom-sta kernel module no longer compiles on kernel 4.4.0-21 (yaketty). Xenial kernel works fine.

-------- Uninstall Beginning --------
Module: broadcom-sta
Version: 6.30.223.271
Kernel: 4.4.0-21-generic (x86_64)
-------------------------------------

Status: Before uninstall, this module version was ACTIVE on this kernel.

wl.ko:
 - Uninstallation
   - Deleting from: /lib/modules/4.4.0-21-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

depmod.....

Backing up initrd.img-4.4.0-21-generic to /boot/initrd.img-4.4.0-21-generic.old-dkms
Making new initrd.img-4.4.0-21-generic
(If next boot fails, revert to initrd.img-4.4.0-21-generic.old-dkms image)
update-initramfs....

DKMS: uninstall completed.

------------------------------
Deleting module version: 6.30.223.271
completely from the DKMS tree.
------------------------------
Done.
Unpacking broadcom-sta-dkms (6.30.223.271-2) over (6.30.223.271-2) ...
Processing triggers for initramfs-tools (0.122ubuntu8) ...
update-initramfs: Generating /boot/initrd.img-4.4.0-22-generic
Setting up broadcom-sta-dkms (6.30.223.271-2) ...
Loading new broadcom-sta-6.30.223.271 DKMS files...
Building only for 4.4.0-22-generic
Building initial module for 4.4.0-22-generic
ERROR: Cannot create report: [Errno 17] File exists: '/var/crash/broadcom-sta-dkms.0.crash'
Error! Bad return status for module build on kernel: 4.4.0-22-generic (x86_64)
Consult /var/lib/dkms/broadcom-sta/6.30.223.271/build/make.log for more information.

and the make.log shows:

DKMS make.log for broadcom-sta-6.30.223.271 for kernel 4.4.0-22-generic (x86_64)
ma 9 mei 2016 9:18:48 CEST
/bin/sh: 1: [: Illegal number:
/bin/sh: 1: [: Illegal number:
Wireless Extension is the only possible API for this kernel version
Using Wireless Extension API
KBUILD_NOPEDANTIC=1 make -C /lib/modules/4.4.0-22-generic/build M=`pwd`
make[1]: Entering directory '/usr/src/linux-headers-4.4.0-22-generic'
arch/x86/Makefile:133: stack-protector enabled but compiler support broken
Makefile:670: Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong not supported by compiler
CFG80211 API is prefered for this kernel version
Using CFG80211 API
Kernel architecture is X86_64
  LD /var/lib/dkms/broadcom-sta/6.30.223.271/build/built-in.o
  CC [M] /var/lib/dkms/broadcom-sta/6.30.223.271/build/src/shared/linux_osl.o
/var/lib/dkms/broadcom-sta/6.30.223.271/build/src/shared/linux_osl.c:1:0: error: code model kernel does not support PIC mode
 /*
 ^
scripts/Makefile.build:258: recipe for target '/var/lib/dkms/broadcom-sta/6.30.223.271/build/src/shared/linux_osl.o' failed
make[2]: *** [/var/lib/dkms/broadcom-sta/6.30.223.271/build/src/shared/linux_osl.o] Error 1
Makefile:1396: recipe for target '_module_/var/lib/dkms/broadcom-sta/6.30.223.271/build' failed
make[1]: *** [_module_/var/lib/dkms/broadcom-sta/6.30.223.271/build] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.4.0-22-generic'
Makefile:177: recipe for target 'all' failed
make: *** [all] Error 2