staging: tidspbridge/pmgr: use strlcpy instead of strncpy

  The fields must be null-terminated,
  or next strcpy in dbll_find_dsp_symbol, will cause issue

additoinal info:
  dbll_find_dsp_symbol call find_symbol_callback to get name.
  and then call strcpy to copy the name to upper caller.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Cc: Omar Ramirez Luna <omar.ramirez@copitl.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>