This patch fixes multiple issues with the nameserver_get and related
functions. The patch includes the following main changes.
	- nameserver_remote_get function is called only for valid
		remote notify handles in nameserver_get. Additional
		error checks have also been added.
	- Additional WARN_ONs and error checks have been added for
		input arguments in nameserver_remote_get function.
	- nameserver_remotenotify_message structure misalignment has
		been fixed. This issue is causing the remote processor
		to return wrong values when queried.
	- Additional error check has been added to ensure that there
		is a valid buffer to copy after receiving a response
		from the remote processor in nameserver_remotenotify_get
		function.
Signed-off-by: Suman Anna <s-anna@ti.com>