crypto: starfive - Remove unneeded NULL checks

crypto: starfive - Remove unneeded NULL checks

NULL check before kfree_sensitive function is not needed.

Signed-off-by: Jia Jie Ho <jiajie.ho@starfivetech.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311301702.LxswfETY-lkp@intel.com/
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from mainline commit 555e387047761eb909a0a1a8230efad3fa3e82ca)
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Change-Id: I2b868f089ac0bf9fa49bf2657f3fea98fa5c2cfa