imx: bootaux: support i.MX8M

Add i.MX8M support. Because i.MX8M use SiP call trap
to Arm Trusted Firmware to handle M4, so use #ifdef
to avoid build error on i.MX6/7.

Signed-off-by: Peng Fan <peng.fan@nxp.com>

arch/arm/mach-imx/imx_bootaux.c

@@ -6,7 +6,9 @@
 
 #include <common.h>
 #include <asm/io.h>
+#include <asm/mach-imx/sys_proto.h>
 #include <command.h>
+#include <imx_sip.h>
 #include <linux/compiler.h>
 
 int arch_auxiliary_core_up(u32 core_id, ulong boot_private_data)
@@ -24,14 +26,21 @@ int arch_auxiliary_core_up(u32 core_id, ulong boot_private_data)
 	writel(pc, M4_BOOTROM_BASE_ADDR + 4);
 
 	/* Enable M4 */
+#ifdef CONFIG_MX8M
+	call_imx_sip(IMX_SIP_SRC, IMX_SIP_SRC_M4_START, 0, 0);
+#else
 	clrsetbits_le32(SRC_BASE_ADDR + SRC_M4_REG_OFFSET,
 			SRC_M4C_NON_SCLR_RST_MASK, SRC_M4_ENABLE_MASK);
+#endif
 
 	return 0;
 }
 
 int arch_auxiliary_core_check_up(u32 core_id)
 {
+#ifdef CONFIG_MX8M
+	return call_imx_sip(IMX_SIP_SRC, IMX_SIP_SRC_M4_STARTED, 0, 0);
+#else
 	unsigned int val;
 
 	val = readl(SRC_BASE_ADDR + SRC_M4_REG_OFFSET);
@@ -40,6 +49,7 @@ int arch_auxiliary_core_check_up(u32 core_id)
 		return 0;  /* assert in reset */
 
 	return 1;
+#endif
 }
 
 /*