mpc83xx: fix 837x MDS PCI HOST build

commit 6aa3d3bf
"83xx: Remove warmboot parameter from PCI init functions" missed
one mpc83xx_pcie_init callsite, causing this build error:

Configuring for MPC837XEMDS_HOST board...
pci.c: In function 'pci_init_board':
pci.c:141: error: too many arguments to function 'mpc83xx_pcie_init'

this patch extends the commit to include that callsite.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>