spd: trusty: OEN_TAP_START aperture for standard calls
spd: trusty: OEN_TAP_START aperture for standard calls

This patch uses the OEN_TAP_START aperture for all the standard
calls being passed to Trusty.

Change-Id: Id78d01c7f48e4f54855600d7c789ffbfb898c541
Signed-off-by: Amith <c4734a83828888714e3d1d3c7f1bfc933c2e4e34@nvidia.com>
Signed-off-by: Varun Wadekar <517ae08f01cae398dbba5bef5ba1750f384c6daf@nvidia.com>

achingupta/arm-trusted-firmware,sbranden/arm-trusted-firmware,sbranden/arm-trusted-firmware,lsigithub/arm-trusted-firmware_public,achingupta/arm-trusted-firmware,lsigithub/arm-trusted-firmware_public