powerpc/b4: Fix the wrong register offset of B4 PCIE module

B4420/B4860 PCIE can not work because of the wrong definition of
the PCIE register offset in the file:
	arch/powerpc/include/asm/immap_85xx.h

Add the judgement of B4420/B4860 to make the register offset to:
	#define CONFIG_SYS_MPC85xx_PCIE1_OFFSET         0x200000

Signed-off-by: Liu Gang <Gang.Liu@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

arch/powerpc/include/asm/immap_85xx.h

@@ -2914,7 +2914,8 @@ struct ccsr_pman {
 #define CONFIG_SYS_MPC85xx_IFC_OFFSET		0x124000
 #define CONFIG_SYS_MPC85xx_GPIO_OFFSET		0x130000
 #define CONFIG_SYS_FSL_CORENET_RMAN_OFFSET	0x1e0000
-#ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
+#if defined(CONFIG_SYS_FSL_QORIQ_CHASSIS2) && !defined(CONFIG_PPC_B4860)\
+	&& !defined(CONFIG_PPC_B4420)
 #define CONFIG_SYS_MPC85xx_PCIE1_OFFSET		0x240000
 #define CONFIG_SYS_MPC85xx_PCIE2_OFFSET		0x250000
 #define CONFIG_SYS_MPC85xx_PCIE3_OFFSET		0x260000