Revert "kernel:workqueue: 3.4.48 fixups for Unable to handle kernel NULL pointer dereference at virtual address 00000004: PC is at process_one_work+0x3c/0x4a4: LR is at worker_thread+0x16c/0x370"

This reverts commit ef795b2d49e248fe20d128ae2f458651dce9eada.