Fixed the follwoing sparse warning:
warning: cast from pointer to integer
             of different size [-Wpointer-to-int-cast]

Sparse reports this warning because 'struct regulator*' pointer
was typecasted to 'int' to print the values in function 'dev_err()'.
This could create problem, since pointers size is different from
the integer size. Therefore, fix this issue by using the "%p" format
specifier instead of "%d" in function 'dev_err()' and removed the
typecast. This will also make the code portable.

Bug 200032218

Change-Id: I02e56d25fc886cc4af31862bada7411efb70d10e
Signed-off-by: Amit Sharma <amisharma@nvidia.com>
Reviewed-on: http://git-master/r/559762


Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Shridhar Rasal <srasal@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>