[DRIVER MODEL] Fix typo in ohci-ppc-soc.c

Fix copy-paste bug in ohci-ppc-soc.c(ohci_hcd_ppc_soc_drv_remove)

Signed-off-by: Andrey Volkov <avolkov@varma-el.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>