ARN: at91: introduce SOC_AT91xxx define to allow to compile SoC core support

We can now compile all SoC core support together and DT boards.
We still can not compile together the non DT board.
So We keep the ARCH_AT91xxx for the non DT board and for backward defconfig
compatibility. This will enable the plaform_device ressources.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h
index 1b4865e..38f467c 100644
--- a/arch/arm/mach-at91/pm.h
+++ b/arch/arm/mach-at91/pm.h
@@ -70,7 +70,7 @@
 	at91_ramc_write(1, AT91_DDRSDRC_LPR, saved_lpr1);
 }
 
-#ifdef CONFIG_ARCH_AT91SAM9263
+#ifdef CONFIG_SOC_AT91SAM9263
 /*
  * FIXME either or both the SDRAM controllers (EB0, EB1) might be in use;
  * handle those cases both here and in the Suspend-To-RAM support.