common/console.c: use CONFIG_VAL() with PRE_CON_BUF_* variables

There is currently no support for PRE_CONSOLE_BUFFER in SPL, but if
and when that gets implemented, one would almost certainly want to use
a different address and/or size for the buffer (e.g., U-Boot proper
might specify an address in DRAM and a generous buffer, while SPL
would be much more constrained).

So a prerequisite for adding SPL_PRE_CONSOLE_BUFFER is to make the
code use SPL_-specific values. No functional change.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
diff --git a/common/console.c b/common/console.c
index 92b1c93..dc071f1 100644
--- a/common/console.c
+++ b/common/console.c
@@ -593,13 +593,13 @@
 #define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL	1
 
 #if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
-#define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
+#define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_VAL(PRE_CON_BUF_SZ))
 
 static void pre_console_putc(const char c)
 {
 	char *buffer;
 
-	buffer = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
+	buffer = map_sysmem(CONFIG_VAL(PRE_CON_BUF_ADDR), CONFIG_VAL(PRE_CON_BUF_SZ));
 
 	buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
 
@@ -615,15 +615,15 @@
 static void print_pre_console_buffer(int flushpoint)
 {
 	unsigned long in = 0, out = 0;
-	char buf_out[CONFIG_PRE_CON_BUF_SZ + 1];
+	char buf_out[CONFIG_VAL(PRE_CON_BUF_SZ) + 1];
 	char *buf_in;
 
 	if (IS_ENABLED(CONFIG_SILENT_CONSOLE) && (gd->flags & GD_FLG_SILENT))
 		return;
 
-	buf_in = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
-	if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
-		in = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
+	buf_in = map_sysmem(CONFIG_VAL(PRE_CON_BUF_ADDR), CONFIG_VAL(PRE_CON_BUF_SZ));
+	if (gd->precon_buf_idx > CONFIG_VAL(PRE_CON_BUF_SZ))
+		in = gd->precon_buf_idx - CONFIG_VAL(PRE_CON_BUF_SZ);
 
 	while (in < gd->precon_buf_idx)
 		buf_out[out++] = buf_in[CIRC_BUF_IDX(in++)];