input: misc: Fix unused compiler warning

input: misc:  Fix unused compiler warning

use direct functions rather than read / write wrappers
removes compiler warning about unused code.

Change-Id: I95682dcd24ed2e27eed6022352d6829cd29e2317
Signed-off-by: Philip Rakity <prakity@nvidia.com>
Reviewed-on: http://git-master/r/245374
(cherry picked from commit 86d030622f296bf5667dd3967ebc7cf6c2351d01)
(cherry picked from commit 8f9e2896a2bc4f04b44f954ce1da235611f20deb)
Reviewed-on: http://git-master/r/271478
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>