drivers: soc: Fix error code mismatch

SCM error codes are not in sync with secure world error
codes. Address the error code mismatch and return proper
error codes for failure cases.

Change-Id: Icb0b72c02317a19f23b5b742ef6d9fe68e74bf88
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>