Staging: slicoss: Replace macro with inline defination in slicoss.c

This patch moves the macro "SLIC_GET_SLIC_HANDLE(_adapter, _pslic_handle)" to inline
in slicoss.c since it has been used only once.

Signed-off-by: Monam Agarwal <monamagarwal123@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>