powerpc: P1022: Remove macro CONFIG_P1022

Replace CONFIG_P1022 with ARCH_P1022 in Kconfig and clean up existing
macros.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/arch/powerpc/cpu/mpc85xx/speed.c b/arch/powerpc/cpu/mpc85xx/speed.c
index c20bc9d..2af9143 100644
--- a/arch/powerpc/cpu/mpc85xx/speed.c
+++ b/arch/powerpc/cpu/mpc85xx/speed.c
@@ -683,7 +683,7 @@
 	 */
 #if defined(CONFIG_ARCH_MPC8540) || defined(CONFIG_ARCH_MPC8541) || \
 	defined(CONFIG_ARCH_MPC8560) || defined(CONFIG_ARCH_MPC8555) || \
-	defined(CONFIG_P1022)
+	defined(CONFIG_ARCH_P1022)
 	gd->arch.i2c1_clk = sys_info.freq_systembus;
 #elif defined(CONFIG_ARCH_MPC8544)
 	/*