linux-phytec-ti

powerpc: export of_get_ibm_chip_id function

Export the of_get_ibm_chip_id() function.  This will be used by the
PowerNV NX-842 driver.

Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>