Description: clk: hisilicon: hi3660：Fix potential NULL dereference in hi3660_stub_clk_probe()
References:
Notes:
 bwh> This is in a newly added driver.
Bugs:
upstream: released (4.16-rc7) [9903e41ae1f5d50c93f268ca3304d4d7c64b9311]
4.9-upstream-stable: N/A "Vulnerable code not present"
3.16-upstream-stable: N/A "Vulnerable code not present"
3.2-upstream-stable: N/A "Vulnerable code not present"
sid: N/A "Vulnerable code not present"
4.9-stretch-security: N/A "Vulnerable code not present"
3.16-jessie-security: N/A "Vulnerable code not present"
3.2-wheezy-security: N/A "Vulnerable code not present"