CVE-2021-47205

In the Linux kernel, the following vulnerability has been resolved: clk:
sunxi-ng: Unregister clocks/resets when unbinding Currently, unbinding a
CCU driver unmaps the device’s MMIO region, while leaving its clocks/resets
and their providers registered. This can cause a page fault later when some
clock operation tries to perform MMIO. Fix this by separating the CCU
initialization from the memory allocation, and then using a devres callback
to unregister the clocks and resets. This also fixes a memory leak of the
struct ccu_reset, and uses the correct owner (the specific platform
driver) for the clocks and resets. Early OF clock providers are never
unregistered, and limited error handling is possible, so they are mostly
unchanged. The error reporting is made more consistent by moving the
message inside of_sunxi_ccu_probe.