Partial sync of architectural headers with TF-A

Change-Id: I0509065512907217dc17c0ec5ce474e2bb8d4e89
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/include/lib/aarch32/arch.h b/include/lib/aarch32/arch.h
index 14b1080..3c2a517 100644
--- a/include/lib/aarch32/arch.h
+++ b/include/lib/aarch32/arch.h
@@ -153,6 +153,7 @@
 #define SDCR_SPD_LEGACY		U(0x0)
 #define SDCR_SPD_DISABLE	U(0x2)
 #define SDCR_SPD_ENABLE		U(0x3)
+#define SDCR_SCCD_BIT		(U(1) << 23)
 #define SDCR_RESET_VAL		U(0x0)
 
 /* HSCTLR definitions */