This patch fixes the issues with the status returned from kernel
for gatepeterson_open. The following are the changes.
1. gatepeterson_open - changed the ENOENT to ENXIO, as ENOENT might
   be returned from nameserver and will translate to a different error
   code in user-space
2. gatepeterson_ioctl_open - returning the status of gatepeterson_open
   to the user-level in api_status.
Signed-off-by: Suman Anna <s-anna@ti.com>