imx: add i.MX8 cpu type

Add i.MX8 cpu type and is_imx8/is_imx8qxp help macros.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>

arch/arm/include/asm/arch-imx/cpu.h

@@ -25,12 +25,14 @@
 #define MXC_CPU_MX7S		0x71 /* dummy ID */
 #define MXC_CPU_MX7D		0x72
 #define MXC_CPU_MX8MQ		0x82
+#define MXC_CPU_IMX8QXP		0x92 /* dummy ID */
 #define MXC_CPU_MX7ULP		0xE1 /* Temporally hard code */
 #define MXC_CPU_VF610		0xF6 /* dummy ID */
 
 #define MXC_SOC_MX6		0x60
 #define MXC_SOC_MX7		0x70
 #define MXC_SOC_MX8M		0x80
+#define MXC_SOC_IMX8		0x90 /* dummy */
 #define MXC_SOC_MX7ULP		0xE0 /* dummy */
 
 #define CHIP_REV_1_0            0x10
@@ -41,6 +43,9 @@
 #define CHIP_REV_2_5            0x25
 #define CHIP_REV_3_0            0x30
 
+#define CHIP_REV_A				0x0
+#define CHIP_REV_B				0x1
+
 #define BOARD_REV_1_0           0x0
 #define BOARD_REV_2_0           0x1
 #define BOARD_VER_OFFSET        0x8

arch/arm/include/asm/mach-imx/sys_proto.h

@@ -27,6 +27,7 @@
 #define is_mx6() (is_soc_type(MXC_SOC_MX6))
 #define is_mx7() (is_soc_type(MXC_SOC_MX7))
 #define is_mx8m() (is_soc_type(MXC_SOC_MX8M))
+#define is_imx8() (is_soc_type(MXC_SOC_IMX8))
 
 #define is_mx6dqp() (is_cpu_type(MXC_CPU_MX6QP) || is_cpu_type(MXC_CPU_MX6DP))
 #define is_mx6dq() (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D))
@@ -41,6 +42,8 @@
 
 #define is_mx7ulp() (is_cpu_type(MXC_CPU_MX7ULP))
 
+#define is_imx8qxp() (is_cpu_type(MXC_CPU_IMX8QXP))
+
 #ifdef CONFIG_MX6
 #define IMX6_SRC_GPR10_BMODE		BIT(28)