omap3: make SDRC SHARING setting configurable

Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
diff --git a/arch/arm/include/asm/arch-omap3/sys_proto.h b/arch/arm/include/asm/arch-omap3/sys_proto.h
index 34bd8c5..bcf92fb 100644
--- a/arch/arm/include/asm/arch-omap3/sys_proto.h
+++ b/arch/arm/include/asm/arch-omap3/sys_proto.h
@@ -23,6 +23,7 @@
 
 /* Board SDRC timing values */
 struct board_sdrc_timings {
+	u32 sharing;
 	u32 mcfg;
 	u32 ctrla;
 	u32 ctrlb;