ARM: atmel: sama5: add sfr register header file

The SFR (special function registers) can be shared bwteen
sama5d3 and sama5d4 soc.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
[whitespace adoptions for 80 char compliance]
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>

arch/arm/include/asm/arch-at91/sama5_sfr.h

+/*
+ * Special Function Register (SFR)
+ *
+ * Copyright (C) 2014 Atmel
+ *		      Bo Shen <voice.shen@atmel.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __SAMA5_SFR_H
+#define __SAMA5_SFR_H
+
+struct atmel_sfr {
+	u32 reserved1;	/* 0x00 */
+	u32 ddrcfg;	/* 0x04: DDR Configuration Register */
+	u32 reserved2;	/* 0x08 */
+	u32 reserved3;	/* 0x0c */
+	u32 ohciicr;	/* 0x10: OHCI Interrupt Configuration Register */
+	u32 ohciisr;	/* 0x14: OHCI Interrupt Status Register */
+	u32 reserved4[4];	/* 0x18 ~ 0x24 */
+	u32 secure;		/* 0x28: Security Configuration Register */
+	u32 reserved5[5];	/* 0x2c ~ 0x3c */
+	u32 ebicfg;		/* 0x40: EBI Configuration Register */
+	u32 reserved6[2];	/* 0x44 ~ 0x48 */
+	u32 sn0;		/* 0x4c */
+	u32 sn1;		/* 0x50 */
+	u32 aicredir;	/* 0x54 */
+};
+
+/* Bit field in DDRCFG */
+#define ATMEL_SFR_DDRCFG_FDQIEN		0x00010000
+#define ATMEL_SFR_DDRCFG_FDQSIEN	0x00020000
+
+/* Bit field in AICREDIR */
+#define ATMEL_SFR_AICREDIR_KEY		0x5F67B102
+#define ATMEL_SFR_AICREDIR_NSAIC	0x00000001
+
+#endif