Description: clk-sunxi: fix a missing-check bug in sunxi_divs_clk_setup()
References:
 https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux.git/commit/?h=sunxi/clk-for-5.3&id=fcdf445ff42f036d22178b49cf64e92d527c1330
Notes:
 bwh> Memory allocation failure in init code results in null pointer
 bwh> dereference.  No security impact.
Bugs:
upstream: N/A "Invalid issue"
4.19-upstream-stable: N/A "Invalid issue"
4.9-upstream-stable: N/A "Invalid issue"
3.16-upstream-stable: N/A "Invalid issue"
sid: N/A "Invalid issue"
4.9-stretch-security: N/A "Invalid issue"
3.16-jessie-security: N/A "Invalid issue"