rockchip: pwm: rk_pwm: use base variable with uintptr_t size

The fdt_addr_t and phys_addr_t size have been decoupled.
A 32bit CPU can expect 64-bit data from the device tree parser,
so use a base variable with uintptr_t size in the
rk_pwm.c file.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/pwm/rk_pwm.c b/drivers/pwm/rk_pwm.c
index 071eb04..1858d59 100644
--- a/drivers/pwm/rk_pwm.c
+++ b/drivers/pwm/rk_pwm.c
@@ -30,7 +30,7 @@
 };
 
 struct rk_pwm_priv {
-	fdt_addr_t base;
+	uintptr_t base;
 	ulong freq;
 	u32 conf_polarity;
 	const struct rockchip_pwm_data *data;