powerpc: ppc4xx: remove board support for bluestone

This board has been orphaned for more than 6 months.

It is the last board defining CONFIG_APM821XX.
The code inside #ifdef CONFIG_APM821XX should be removed too.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/arch/powerpc/include/asm/ppc4xx-ebc.h b/arch/powerpc/include/asm/ppc4xx-ebc.h
index 07a3fe0..952783f 100644
--- a/arch/powerpc/include/asm/ppc4xx-ebc.h
+++ b/arch/powerpc/include/asm/ppc4xx-ebc.h
@@ -53,8 +53,7 @@
 #define EBC_NUM_BANKS	6
 #endif
 
-#if defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
-    defined(CONFIG_APM821XX)
+#if defined(CONFIG_440SP) || defined(CONFIG_440SPE)
 #define EBC_NUM_BANKS	3
 #endif