[aes_serial] Replace hardcoded GPIO addr with constant from top_earlgrey.h

This is related to lowRISC/OpenTitan#4163.

Signed-off-by: Pirmin Vogel <vogelpi@lowrisc.org>

sw/device/sca/aes_serial/aes_serial.c

diff --git a/sw/device/sca/aes_serial/aes_serial.c b/sw/device/sca/aes_serial/aes_serial.c
index 2ec2c4c..7951458 100644
--- a/sw/device/sca/aes_serial/aes_serial.c
+++ b/sw/device/sca/aes_serial/aes_serial.c
@@ -316,8 +316,8 @@
   CHECK(dif_rv_timer_irq_enable(&timer, kHart, kComparator,
                                 kDifRvTimerEnabled) == kDifRvTimerOk);
 
-  dif_gpio_params_t gpio_params = {.base_addr =
-                                       mmio_region_from_addr(0x40010000)};
+  dif_gpio_params_t gpio_params = {
+      .base_addr = mmio_region_from_addr(TOP_EARLGREY_GPIO_BASE_ADDR)};
   CHECK(dif_gpio_init(gpio_params, &gpio) == kDifGpioOk);
   CHECK(dif_gpio_output_set_enabled_all(&gpio, 0x08200) == kDifGpioOk);
   CHECK(dif_gpio_write_all(&gpio, kGpioCaptureTriggerLow) == kDifGpioOk);