powerpc, 8xx: Migrate to Kconfig

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/i2c/soft_i2c.c b/drivers/i2c/soft_i2c.c
index 50597a7..a21e4a2 100644
--- a/drivers/i2c/soft_i2c.c
+++ b/drivers/i2c/soft_i2c.c
@@ -29,7 +29,7 @@
 #include <asm/arch/gpio.h>
 #endif
 #endif
-#if defined(CONFIG_MPC852T) || defined(CONFIG_MPC866)
+#if defined(CONFIG_8xx)
 #include <asm/io.h>
 #endif
 #include <i2c.h>