arm: stm32mp: migrate trace to log macro

Change debug and pr_ macro to log macro and define LOG_CATEGORY.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/arch/arm/mach-stm32mp/dram_init.c b/arch/arm/mach-stm32mp/dram_init.c
index 0e8ce63..32b177b 100644
--- a/arch/arm/mach-stm32mp/dram_init.c
+++ b/arch/arm/mach-stm32mp/dram_init.c
@@ -3,6 +3,8 @@
  * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
  */
 
+#define LOG_CATEGORY LOGC_ARCH
+
 #include <common.h>
 #include <dm.h>
 #include <image.h>
@@ -21,15 +23,15 @@
 
 	ret = uclass_get_device(UCLASS_RAM, 0, &dev);
 	if (ret) {
-		debug("RAM init failed: %d\n", ret);
+		log_debug("RAM init failed: %d\n", ret);
 		return ret;
 	}
 	ret = ram_get_info(dev, &ram);
 	if (ret) {
-		debug("Cannot get RAM size: %d\n", ret);
+		log_debug("Cannot get RAM size: %d\n", ret);
 		return ret;
 	}
-	debug("RAM init base=%lx, size=%x\n", ram.base, ram.size);
+	log_debug("RAM init base=%lx, size=%x\n", ram.base, ram.size);
 
 	gd->ram_size = ram.size;