ARM: shmobile: Rework multiplatform include workaround

Now when the majority of the include files have moved from
arch/arm/mach-shmobile/include/mach/ to arch/arm/mach-shmobile/
remove the header include file workaround in the Makefile...

... and add another workaround in irqs.h to cope with the fact
that <mach/irqs.h> needs to be where it is until the PFC code
has been updated to remove legacy non-DT interfaces.
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/Makefile

@@ -2,8 +2,6 @@
 # Makefile for the linux kernel.
 #
 
-ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/arch/arm/mach-shmobile/include
-
 # Common objects
 obj-y				:= timer.o console.o
 

arch/arm/mach-shmobile/irqs.h

@@ -2,7 +2,7 @@
 #define __SHMOBILE_IRQS_H
 
 #include <linux/sh_intc.h>
-#include <mach/irqs.h>
+#include "include/mach/irqs.h"
 
 /* GIC */
 #define gic_spi(nr)		((nr) + 32)