arm: mach-shmobile: Constify sh_mobile_meram_cfg structures

The structures, passed to the sh_mobile_lcdcfb driver through platform
data, are read only by the driver. Make them const.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 714955e..d4cc2de 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -579,7 +579,8 @@
 #endif
 	},
 };
-static struct sh_mobile_meram_cfg lcd_meram_cfg = {
+
+static const struct sh_mobile_meram_cfg lcd_meram_cfg = {
 	.icb[0] = {
 		.meram_size     = 0x40,
 	},
@@ -856,7 +857,7 @@
 	return error;
 }
 
-static struct sh_mobile_meram_cfg hdmi_meram_cfg = {
+static const struct sh_mobile_meram_cfg hdmi_meram_cfg = {
 	.icb[0] = {
 		.meram_size     = 0x100,
 	},