[PATCH 3/5] ppc32: Fix config space address calculation for Yucca PCIE initialization

Fix config space address calculation for Yucca PCIE initialization. The
problem was in signed integer using.  The size of each config space
segment is 0x40000000 so the offset of config space for third hose will
be calculated as negative number if number of hose signed integer.

Signed-off-by: Ruslan V. Sushko <redacted>

Looks good.  Matt, please apply.

 - R.