Syslink: Notify,various fixes on Notify driver to support notify functionality on the kernel/user side

This patch contains various fixes on the notify module.These
include:
	- Memory allocation and freeing as required.
	- Remove/modify conditions in functions
	  notify_destroy()
	  notify_ducatidrv_qsearch_elem(), etc.
	- Remove compile time warning for
	  notify_drv_unregister_driver()
Signed-off-by: C A Subramaniam <subramaniam.ca@ti.com>