mpc83xx: tqm8349 - remove pci & flash window conflict

commit 9993e196 "mpc83xx: convert all
remaining boards over to 83XX_GENERIC_PCI" remapped pci windows on
tqm834x to make it more consistent with the other 83xx boards.  During
that time however, the author failed to realize that FLASH_BASE was
occupying the same range as what PCI1_MEM_BASE was being assigned.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Tested-by: Wolfgang Denk <wd@denx.de>