refactor(st-ddr): add definition for timeouts and delays

Instead of using hard-coded number in DDR driver, use macros.
Modify TIMEOUT_US_1S to DDR_TIMEOUT_US_1S to align with other defines.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I489084132821774b0049a4a5d7fc30db24a7bb11
diff --git a/include/drivers/st/stm32mp_ddr.h b/include/drivers/st/stm32mp_ddr.h
index 4535e3c..f28f8d6 100644
--- a/include/drivers/st/stm32mp_ddr.h
+++ b/include/drivers/st/stm32mp_ddr.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2022-2023, STMicroelectronics - All Rights Reserved
+ * Copyright (C) 2022-2024, STMicroelectronics - All Rights Reserved
  *
  * SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
  */
@@ -57,7 +57,12 @@
 	size_t size;    /* Memory size in byte = col * row * width */
 };
 
-#define TIMEOUT_US_1S	1000000U
+#define DDR_DELAY_1US		1U
+#define DDR_DELAY_2US		2U
+#define DDR_DELAY_10US		10U
+#define DDR_DELAY_50US		50U
+#define DDR_TIMEOUT_500US	500U
+#define DDR_TIMEOUT_US_1S	1000000U
 
 void stm32mp_ddr_set_reg(const struct stm32mp_ddr_priv *priv, enum stm32mp_ddr_reg_type type,
 			 const void *param, const struct stm32mp_ddr_reg_info *ddr_registers);