ARC: [Review] Multi-platform image #4: Isolate platform headers

-Top level ARC makefile removes -I for platform headers
-asm/irq.h no longer includes plat/irq.h

-platform makefile adds -I for it's specfic platform headers
-platform code to directly include it's plat/irq.h

-Linker script needed plat/memmap.h for CCM info, already in .config

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-arcfpga/platform.c
index ac85d69..4024f10 100644
--- a/arch/arc/plat-arcfpga/platform.c
+++ b/arch/arc/plat-arcfpga/platform.c
@@ -16,11 +16,11 @@
 #include <linux/console.h>
 #include <linux/of_platform.h>
 #include <asm/setup.h>
-#include <asm/irq.h>
 #include <asm/clk.h>
 #include <asm/mach_desc.h>
 #include <plat/memmap.h>
 #include <plat/smp.h>
+#include <plat/irq.h>
 
 /*-----------------------BVCI Latency Unit -----------------------------*/