Kconfig: Convert CONFIG_SYS_SRAM_BASE to Kconfig

This converts ad-hoc CONFIG_SYS_SRAM_BASE to Kconfig.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
diff --git a/Kconfig b/Kconfig
index 54b3680..9f7707a 100644
--- a/Kconfig
+++ b/Kconfig
@@ -390,6 +390,11 @@
 	  SRAM base address is controlled by CONFIG_SYS_SRAM_BASE.
 	  SRAM size is controlled by CONFIG_SYS_SRAM_SIZE.
 
+config SYS_SRAM_BASE
+	hex
+	default 0x80000000 if TARGET_PIC32MZDASK
+	default 0x0
+
 endmenu		# General setup
 
 menu "Boot images"
diff --git a/include/configs/pic32mzdask.h b/include/configs/pic32mzdask.h
index 73edd28..25b898f 100644
--- a/include/configs/pic32mzdask.h
+++ b/include/configs/pic32mzdask.h
@@ -19,7 +19,6 @@
 /*----------------------------------------------------------------------
  * Memory Layout
  */
-#define CONFIG_SYS_SRAM_BASE		0x80000000
 #define CONFIG_SYS_SRAM_SIZE		0x00080000 /* 512K */
 
 /* Initial RAM for temporary stack, global data */
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 6645d73..1345cef 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -3715,7 +3715,6 @@
 CONFIG_SYS_SPL_MALLOC_SIZE
 CONFIG_SYS_SPL_MALLOC_START
 CONFIG_SYS_SPR
-CONFIG_SYS_SRAM_BASE
 CONFIG_SYS_SRAM_SIZE
 CONFIG_SYS_SRAM_START
 CONFIG_SYS_SRIO