powerpc/85xx: Add platform_device declaration to fsl_pci.h

mpc85xx_pci_err_probe(struct platform_device *op) need platform_device
declaration for definition. Otherwise, it will cause compile error if any
files including fsl_pci.h without declaration of platform_device.
Signed-off-by: Jia Hongtao <hongtao.jia@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/sysdev/fsl_pci.h

@@ -14,6 +14,8 @@
 #ifndef __POWERPC_FSL_PCI_H
 #define __POWERPC_FSL_PCI_H
 
+struct platform_device;
+
 #define PCIE_LTSSM	0x0404		/* PCIE Link Training and Status */
 #define PCIE_LTSSM_L0	0x16		/* L0 state */
 #define PCIE_IP_REV_2_2		0x02080202 /* PCIE IP block version Rev2.2 */