powerpc: P1011: Remove macro CONFIG_P1011

Replace CONFIG_P1011 with ARCH_P1011 in Kconfig. P1011RDB seems to be in
scrapyard though.

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 8ad503e..66a5f14 100644
--- a/arch/powerpc/include/asm/config_mpc85xx.h
+++ b/arch/powerpc/include/asm/config_mpc85xx.h
@@ -169,7 +169,7 @@
 #define CONFIG_ESDHC_HC_BLK_ADDR
 
 /* P1011 is single core version of P1020 */
-#elif defined(CONFIG_P1011)
+#elif defined(CONFIG_ARCH_P1011)
 #define CONFIG_MAX_CPUS			1
 #define CONFIG_SYS_FSL_NUM_LAWS		12
 #define CONFIG_SYS_PPC_E500_DEBUG_TLB	2