Exported APIs like below are defined in private header file
nvhost_syncpt_unit_interface.h
nvhost_syncpt_unit_interface_get_aperture()
nvhost_syncpt_unit_interface_get_byte_offset()

This causes linking problems if these functions are needed
by some other driver outside nvhost

Hence move these exported APIs into a new public
header in include/linux/nvhost_t194.h

Change-Id: Ib70177da71c2cc6aee1c6da2668b0a92ea01ccf7
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1480588
Reviewed-by: Arto Merilainen <amerilainen@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Tested-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>