include: sbi_utils: Introduce an helper to get fdt base address

This simply adds an helper to get fdt address which is more explicit than
sbi_scratch_thishart_arg1_ptr.

Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>

lib/utils/ipi/fdt_ipi.c

@@ -45,7 +45,7 @@ static int fdt_ipi_cold_init(void)
 	int pos, noff, rc;
 	struct fdt_ipi *drv;
 	const struct fdt_match *match;
-	void *fdt = sbi_scratch_thishart_arg1_ptr();
+	void *fdt = fdt_get_address();
 
 	for (pos = 0; pos < array_size(ipi_drivers); pos++) {
 		drv = ipi_drivers[pos];

lib/utils/irqchip/fdt_irqchip.c

@@ -38,7 +38,7 @@ static int fdt_irqchip_cold_init(void)
 	int pos, noff, rc;
 	struct fdt_irqchip *drv;
 	const struct fdt_match *match;
-	void *fdt = sbi_scratch_thishart_arg1_ptr();
+	void *fdt = fdt_get_address();
 
 	for (pos = 0; pos < array_size(irqchip_drivers); pos++) {
 		drv = irqchip_drivers[pos];

lib/utils/reset/fdt_reset.c

@@ -33,7 +33,7 @@ int fdt_reset_init(void)
 	int pos, noff, rc;
 	struct fdt_reset *drv;
 	const struct fdt_match *match;
-	void *fdt = sbi_scratch_thishart_arg1_ptr();
+	void *fdt = fdt_get_address();
 
 	for (pos = 0; pos < array_size(reset_drivers); pos++) {
 		drv = reset_drivers[pos];

lib/utils/serial/fdt_serial.c

@@ -40,7 +40,7 @@ int fdt_serial_init(void)
 	struct fdt_serial *drv;
 	const struct fdt_match *match;
 	int pos, noff = -1, len, coff, rc;
-	void *fdt = sbi_scratch_thishart_arg1_ptr();
+	void *fdt = fdt_get_address();
 
 	/* Find offset of node pointed to by stdout-path */
 	coff = fdt_path_offset(fdt, "/chosen");

lib/utils/timer/fdt_timer.c

@@ -45,7 +45,7 @@ static int fdt_timer_cold_init(void)
 	int pos, noff, rc;
 	struct fdt_timer *drv;
 	const struct fdt_match *match;
-	void *fdt = sbi_scratch_thishart_arg1_ptr();
+	void *fdt = fdt_get_address();
 
 	for (pos = 0; pos < array_size(timer_drivers); pos++) {
 		drv = timer_drivers[pos];