mpc83xx: Fix missing build for mpc8349emds pci.c ...

Make pci build for mpc8349emds

Signed-off-by: Tanya Jiang <tanya.jiang@freescale.com>

Move "ar" flags to config.mk to allow for silent "make -s" ...

Based on patch by Mike Frysinger, 20 Jun 2006

Add support for a saving build objects in a separate directory. ...

Modifications are based on the linux kernel approach and
support two use cases:

  1) Add O= to the make command line
  'make O=/tmp/build all'

  2) Set environement variable BUILD_DIR to point to the desired location
  'export BUILD_DIR=/tmp/build'
  'make'

The second approach can also be used with a MAKEALL script
'export BUILD_DIR=/tmp/build'
'./MAKEALL'

Command line 'O=' setting overrides BUILD_DIR environent variable.

When none of the above methods is used the local build is performed and
the object files are placed in the source directory.

Add initial support for MPC8349E MDS board.