UPSTREAM: nvmem: sprd: Optimize the block lock operation

We have some cases that will programme the eFuse block partially multiple
times, so we should allow the block to be programmed again if it was
programmed partially. But we should lock the block if the whole block
was programmed. Thus add a condition to validate if we need lock the
block or not.

Moreover we only enable the auto-check function when locking the block.

bug: 153500755
Change-Id: Ia019890c01781a298c6676ede19a6b2da2728000
Signed-off-by: Freeman Liu <freeman.liu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200323150007.7487-3-srinivas.kandagatla@linaro.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 5af25388ba250ae9624a22587cc98685dc6d4e9e)