powerpc: MPC8569: Remove macro CONFIG_MPC8569

Replace CONFIG_MPC8569 with ARCH_MPC8569 in Kconfig and clean up existing
macros.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h
index c38d983..c162c9d 100644
--- a/arch/powerpc/include/asm/config_mpc85xx.h
+++ b/arch/powerpc/include/asm/config_mpc85xx.h
@@ -113,7 +113,7 @@
 #define CONFIG_SYS_FSL_RMU
 #define CONFIG_SYS_FSL_SRIO_MSG_UNIT_NUM	2
 
-#elif defined(CONFIG_MPC8569)
+#elif defined(CONFIG_ARCH_MPC8569)
 #define CONFIG_MAX_CPUS			1
 #define CONFIG_SYS_FSL_NUM_LAWS		10
 #define CONFIG_SYS_FSL_SEC_COMPAT	2
diff --git a/arch/powerpc/include/asm/immap_85xx.h b/arch/powerpc/include/asm/immap_85xx.h
index ec4c837..123dcad 100644
--- a/arch/powerpc/include/asm/immap_85xx.h
+++ b/arch/powerpc/include/asm/immap_85xx.h
@@ -2210,7 +2210,7 @@
 	u32	gpiocr;		/* GPIO control */
 #endif
 	u8	res3[12];
-#if defined(CONFIG_MPC8569)
+#if defined(CONFIG_ARCH_MPC8569)
 	u32	plppar1;	/* Platform port pin assignment 1 */
 	u32	plppar2;	/* Platform port pin assignment 2 */
 	u32	plpdir1;	/* Platform port pin direction 1 */
@@ -2484,7 +2484,7 @@
 	u32	svr;		/* System version */
 	u8	res10[8];
 	u32	rstcr;		/* Reset control */
-#if defined(CONFIG_ARCH_MPC8568) || defined(CONFIG_MPC8569)
+#if defined(CONFIG_ARCH_MPC8568) || defined(CONFIG_ARCH_MPC8569)
 	u8	res11a[76];
 	par_io_t qe_par_io[7];
 	u8	res11b[1600];