global: Migrate CONFIG_MALLOC_F_ADDR to CFG

Perform a simple rename of CONFIG_MALLOC_F_ADDR to CFG_MALLOC_F_ADDR

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c
index 622df41..2346528 100644
--- a/arch/sandbox/cpu/start.c
+++ b/arch/sandbox/cpu/start.c
@@ -535,7 +535,7 @@
 	}
 
 #if CONFIG_VAL(SYS_MALLOC_F_LEN)
-	gd->malloc_base = CONFIG_MALLOC_F_ADDR;
+	gd->malloc_base = CFG_MALLOC_F_ADDR;
 #endif
 #if CONFIG_IS_ENABLED(LOG)
 	gd->default_log_level = state->default_log_level;